Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND RECENT TRANSACTIONS (Details)

v3.8.0.1
ACQUISITIONS AND RECENT TRANSACTIONS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 4,043 $ 10,120
FM Translator, Aurora, Florida (asset purchase)    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Dec. 31, 2016
FM Translator Port St. Lucie Florida Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Dec. 31, 2016
FM Translator Rhinelander Wisconsin Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Dec. 14, 2016
FM Translator Little Fish Lake Valley California Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 44
Business Acquisition, Effective Date of Acquisition   Dec. 08, 2016
FM Translator Lake Placid Florida Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 35
Business Acquisition, Effective Date of Acquisition   Dec. 01, 2016
Christian Concert Alerts.com [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 150
Business Acquisition, Effective Date of Acquisition   Dec. 01, 2016
FM Translator construction permit, Kihei, Hawaii asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 55
Business Acquisition, Effective Date of Acquisition   Nov. 22, 2016
FM Translator construction permit, Lahaina, Hawaii asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 55
Business Acquisition, Effective Date of Acquisition   Nov. 22, 2016
FM Translator Crested Butte Colorado Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 39
Business Acquisition, Effective Date of Acquisition   Nov. 22, 2016
FM Translator Dansville New York Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 75
Business Acquisition, Effective Date of Acquisition   Nov. 21, 2016
FM Translator Carbondale Pennsylvania Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 75
Business Acquisition, Effective Date of Acquisition   Nov. 21, 2016
FM Translator Sebring Florida Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 77
Business Acquisition, Effective Date of Acquisition   Nov. 07, 2016
KXFN-AM, St. Louis, Missouri business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 190
Business Acquisition, Effective Date of Acquisition   Oct. 20, 2016
FM Translator construction permit, Angola, Indiana asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Oct. 20, 2016
FM Translator construction permit, Cofax, Indiana asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 55
Business Acquisition, Effective Date of Acquisition   Oct. 20, 2016
FM Translator construction permit, Battle Creek, Michigan asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Oct. 20, 2016
FM Translator construction permit Palm Coast, Florida Related Partyasset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 65
Business Acquisition, Effective Date of Acquisition   Oct. 19, 2016
Historyonthenet.com and Authentichistory.com asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 85
Business Acquisition, Effective Date of Acquisition   Oct. 17, 2016
FM Translator Lake City Florida Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 65
Business Acquisition, Effective Date of Acquisition   Oct. 12, 2016
Mill City Press and Bookprinting.com (business acquisition) [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 3,515
Business Acquisition, Effective Date of Acquisition   Aug. 01, 2016
FM Translator, Columbus, Ohio asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 345
Business Acquisition, Effective Date of Acquisition   Jun. 20, 2016
Fm Translator Amherst New York Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 60
Business Acquisition, Effective Date of Acquisition   Jun. 10, 2016
Fm Translator Construction Permit Charlotte Michigan Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Jun. 08, 2016
Fm Translator Construction Permit Atwood Kentucky Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 88
Business Acquisition, Effective Date of Acquisition   Jun. 03, 2016
Fm Translator Construction Permit Kerrville Texas Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   May 13, 2016
Fm Translator Lincoln Maine Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 100
Business Acquisition, Effective Date of Acquisition   May 02, 2016
Fm Translator Construction Permit Emporia Kansas Asset Purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 25
Business Acquisition, Effective Date of Acquisition   Apr. 29, 2016
Retirement Watch Business Acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 100
Business Acquisition, Effective Date of Acquisition   Apr. 01, 2016
Purchase of other domain names and assets asset purchases [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 6
King James Bible Mobile Applications [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 4,000
Business Acquisition, Effective Date of Acquisition   Mar. 08, 2016
FM translator construction permit, Kingsville, Texas [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 50
Business Acquisition, Effective Date of Acquisition   Nov. 11, 2016
WWRC-AM formerly WSPZ-AM in Bethesda, Maryland business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 620  
Business Acquisition, Effective Date of Acquisition Nov. 22, 2017  
Real property of radio station WSPZ-AM in Bethesda, Maryland business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 1,500  
Business Acquisition, Effective Date of Acquisition Sep. 15, 2017  
TeacherTube.com business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 1,100  
Business Acquisition, Effective Date of Acquisition Aug. 31, 2017  
Intelligence Reporter newsletter business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 0  
Business Acquisition, Effective Date of Acquisition Aug. 31, 2017  
FM Translator construction permit, Eaglemount, Washington asset acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 40  
Business Acquisition, Effective Date of Acquisition Jul. 24, 2017  
TradersCrux.com business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 298  
Business Acquisition, Effective Date of Acquisition Jul. 06, 2017  
FM Translator construction permit, Festus, Missouri asset acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 40  
Business Acquisition, Effective Date of Acquisition Jun. 28, 2017  
Portuguese Bible Mobile Applications business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 82  
Business Acquisition, Effective Date of Acquisition Jun. 08, 2017  
Prayers for Special Help business acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 245  
Business Acquisition, Effective Date of Acquisition Mar. 15, 2017  
FM Translator construction permit, Quartz Site, Arizona asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 20  
Business Acquisition, Effective Date of Acquisition Mar. 14, 2017  
FM Translator construction permit, Roseburg, Oregon asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 45  
Business Acquisition, Effective Date of Acquisition Mar. 01, 2017  
FM Translator, Astoria, Oregon asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 33  
Business Acquisition, Effective Date of Acquisition Jan. 16, 2017  
FM Translator construction permit, Mohave Valley, Arizona asset purchase [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total $ 20  
Business Acquisition, Effective Date of Acquisition Jan. 01, 2017  
Turner Investment Products Business Acquisition [Member]    
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred, Total   $ 416
Business Acquisition, Effective Date of Acquisition   Sep. 13, 2016