Quarterly report pursuant to Section 13 or 15(d)

STOCK INCENTIVE PLAN (Narrative) (Details)

v2.4.1.9
STOCK INCENTIVE PLAN (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of stock option plans 1salm_NumberOfStockOptionPlans  
Total unrecognized compensation cost related to non-vested awards of stock options $ 0.7us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions  
Restricted stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share based compensation, vesting period 1 year  
Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares authorized under plan 5,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Closing stock price $ 6.16us-gaap_SharePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Total fair value of options vested $ 1.3us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
$ 1.5us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option, historical volatility term 6 years  
Minimum [Member] | Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share based compensation, vesting period 4 years  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option, historical volatility term 10 years  
Maximum [Member] | Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options, term 5 years