Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 36,618	$ 36,014	$ 34,203	$ 34,007	$ 32,056	$ 31,310	$ 30,129	$ 33,865	$ 140,842	$ 127,360	$ 127,678
Gross profit	19,595	18,647	17,749	17,889	16,749	15,628	15,370	16,670	73,880	64,417	63,785
Asset impairments and related charges					557	378	826	37		1,798
Net loss	(3,589)	(4,048)	(3,791)	(1,736)	(210)	(1,934)	(3,248)	(2,958)	(13,164)	(8,350)	(11,721)
Legal settlements	$ 15	$ 0	$ 35	$ 91	$ 0	$ 150	$ 0	$ 0	$ 141	$ 150	$ 85
Net loss Per share data-basic and diluted	$ (0.15)	$ (0.18)	$ (0.16)	$ (0.08)	$ (0.01)	$ (0.08)	$ (0.14)	$ (0.13)	$ (0.57)	$ (0.37)	$ (0.52)

Impairments and Other Fair Value Adjustments

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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