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.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Employee Benefit Plans - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Stock-Based Compensation
Total stock-based compensation expense	$ 2,785	$ 2,156	$ 1,781
Stock options
Stock-Based Compensation
Unrecognized compensation expense	$ 5,500
Weighted average period over which compensation expense is expected to be recognized	2 years 10 months 24 days
Restricted stock units
Stock-Based Compensation
Unrecognized compensation expense	$ 1,500
Weighted average period over which compensation expense is expected to be recognized	2 years
Cost of revenues
Stock-Based Compensation
Total stock-based compensation expense	$ 175	146	71
Selling, general and administrative expense
Stock-Based Compensation
Total stock-based compensation expense	2,364	1,804	1,558
Research and development expense
Stock-Based Compensation
Total stock-based compensation expense	$ 246	$ 206	$ 152