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STOCKHOLDERS' EQUITY Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Allocated Share-based Compensation Expense $ 703 $ 1,411  
Cost of Products Revenues [Member]      
Allocated Share-based Compensation Expense 19 15  
Cost of Services Revenues [Member]      
Allocated Share-based Compensation Expense 34 49  
Research and Development Expense [Member]      
Allocated Share-based Compensation Expense 152 88  
Selling and Marketing Expense [Member]      
Allocated Share-based Compensation Expense 360 356  
General and Administrative Expense [Member]      
Allocated Share-based Compensation Expense $ 138 $ 903  
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2,261,527   2,290,017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 9.50   $ 9.65
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 0    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 0.00    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 0    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 0.00    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (28,490)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 21.55    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 1 year 65 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 2,261,527    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 9.50    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 1 year 29 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 2,261,527    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 9.50    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 1 year 65 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 0    
Employee Stock Option [Member] | Time-Based Vesting [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2,261,527   2,290,017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (28,490)    
Employee Stock Option [Member] | Performance-Based Vesting [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 0   0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period 0    
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 3,171,811   3,063,248
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 4.71   $ 5.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms 1 year 95 days    
Share-based Compensation Arrangement by Share-based Payment Award, Non-vested Restricted Stock Aggregate Intrinsic Value $ 14,368    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 1,536,043    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 4.55    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (222,232)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 5.62    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (1,205,248)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 5.33    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected to Vest Number 2,674,948    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Grant Date Fair Value $ 4.88    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected to Vest Weighted Average Remaining Contractual Term 1 year 95 days    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value $ 12,118    
Restricted Stock Units (RSUs) [Member] | Time-Based Vesting [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,942,064   1,809,138
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 803,159    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (222,232)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (448,001)    
Restricted Stock Units (RSUs) [Member] | Performance-Based Vesting [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,229,747   1,254,110
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 732,884    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (757,247)