Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.10.0.1
Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Apr. 01, 2018
Mar. 31, 2018
Assets:        
Prepaid Expense and Other Assets, Current $ 1,283   $ 888 $ 816
Liabilities:        
Accrued Liabilities, Current 3,053   3,400 3,328
Deferred revenue 1,516   1,680 1,790
Deferred revenue non-current 599   627 846
Equity [Abstract]        
Retained Earnings (Accumulated Deficit) (329,355)   (329,316) $ (329,645)
Revenue 13,037 $ 16,574    
Gross profit 5,935 6,767    
Net income (loss) (39) $ (572)    
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Equity [Abstract]        
Revenue 27      
Gross profit 27      
Net income (loss) 27      
Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Assets:        
Prepaid Expense and Other Assets, Current 1,210      
Liabilities:        
Accrued Liabilities, Current 2,980      
Deferred revenue 1,626      
Deferred revenue non-current 791      
Equity [Abstract]        
Retained Earnings (Accumulated Deficit) (329,657)      
Revenue 13,064      
Gross profit 5,962      
Net income (loss) (12)      
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Assets:        
Prepaid Expense and Other Assets, Current (73)   72  
Liabilities:        
Accrued Liabilities, Current (73)   72  
Deferred revenue 110   (110)  
Deferred revenue non-current 192   (219)  
Equity [Abstract]        
Retained Earnings (Accumulated Deficit) (302)   $ 329  
Retained Earnings [Member]        
Equity [Abstract]        
Net income (loss) $ (39)