Stock-Based Compensation (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018  | 
Sep. 30, 2017  | 
Sep. 30, 2018  | 
Sep. 30, 2017  | 
|
| Stock-based compensation expense | ||||
| Stock-based compensation expense | $ 295 | $ 342 | $ 586 | $ 672 | 
| Income tax benefit | 0 | 0 | 0 | 0 | 
| Total stock-based compensation expense, after taxes | $ 295 | $ 342 | $ 586 | $ 672 | 
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available. 
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| X | ||||||||||
- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Stock-based compensation expenses. No definition available. 
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