Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Based Compensation Expense (Details)

v3.8.0.1
Stockholders' Equity - Stock Based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Stock-based compensation expense    
Stock-based compensation expense $ 586 $ 810
Cost of goods sold.    
Stock-based compensation expense    
Stock-based compensation expense 52 65
Research and development    
Stock-based compensation expense    
Stock-based compensation expense 21 29
Selling, general and administrative    
Stock-based compensation expense    
Stock-based compensation expense $ 513 $ 716