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Restricted Stock Awards - Allocations and Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense     $ 93,000    
Retention bonuses in escrow         $ 84,000
Employee service share-based compensation, tax benefit from compensation expense $ 0   0    
Employee service share-based compensation, allocation of recognized period costs, capitalized amount 0 $ 0 0 $ 0  
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense 27,000 17,000 $ 174,000 (5,000)  
Stock issued during period, shares, share-based compensation, gross (in shares)     170,000    
Unrecognized stock-based compensation expense, other than options 221,000   $ 221,000    
Weighted average period for amortization of unrecognized stock-based compensation     6 months 18 days    
Time-based Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense, other than options 66,000   $ 66,000    
Performance-based Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense 155,000   $ 155,000    
Share-based compensation awards, term from grant to expiration     10 years    
Additional Paid-in Capital          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reversal of stock-based compensation expense       110,000  
Additional Paid-in Capital | Unvested Awards, Forfeited          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reversal of stock-based compensation expense       26,000  
Additional Paid-in Capital | Performance-based Awards, Revised Estimates          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reversal of stock-based compensation expense       62,000  
Cost of revenue | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense 2,000 2,000 $ 5,000 (19,000)  
Research and development | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense 1,000 1,000 4,000 (2,000)  
Sales and marketing | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense 0 (10,000) 0 (40,000)  
General and administrative | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense $ 24,000 $ 24,000 $ 165,000 $ 56,000  
Shares Withheld and Repurchased | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares withheld and repurchased to satisfy tax obligation (in shares)     25,000    
Statutory tax withholding requirements     $ 13,000