Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Quarterly Financial Data (Unaudited)
Revenues	$ 30,895	$ 28,733	$ 27,882	$ 26,607	$ 26,091	$ 23,140	$ 24,417	$ 25,475	$ 114,117	$ 99,123
Gross Profit	14,032	11,938	11,384	10,407	9,861	8,892	9,661	10,192	47,761	38,606	$ 39,831
Net (Loss) Income	$ 217	$ (2,068)	$ (2,187)	$ (1,572)	$ (2,432)	$ (2,464)	$ (1,341)	$ (1,579)	$ (5,610)	$ (7,816)	$ (3,526)
Basic Net Income/(Loss) per Share (in dollars per share)	$ 0.01	$ (0.05)	$ (0.05)	$ (0.05)	$ (0.07)	$ (0.07)	$ (0.04)	$ (0.05)	$ (0.14)	$ (0.23)
Diluted Net Income/(Loss) per Share (in dollars per share)	$ 0.01	$ (0.05)	$ (0.05)	$ (0.05)	$ (0.07)	$ (0.07)	$ (0.04)	$ (0.05)	$ (0.14)	$ (0.23)