Unaudited Quarterly Financial Data - Summarized Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 54,446	$ 51,941	$ 60,969	$ 57,420	$ 60,590	$ 60,938	$ 63,904	$ 56,675	$ 224,776	$ 242,107	$ 213,112
Gross Profit	9,580	8,093	10,835	11,948	8,512	11,994	12,441	11,100	$ 40,456	$ 44,047	$ 36,846
Net income (loss) from continuing operations	(787)	(11,851)	3,236	910	(10,847)	122	(967)	(1,485)
Net income (loss)	$ (787)	$ (11,851)	$ 3,236	$ 910	$ (10,847)	$ 122	$ (967)	$ (1,485)
Earnings (loss) Per Share Basic
Earnings (loss) from continuing operations	$ (0.04)	$ (0.60)	$ 0.16	$ 0.05	$ (0.55)	$ 0.01	$ (0.05)	$ (0.09)
Earnings (loss) Per Share Diluted
Earnings (loss) from continuing operations	$ (0.04)	$ (0.60)	$ 0.16	$ 0.05	$ (0.55)	$ 0.01	$ (0.05)	$ (0.09)
Basic	19,696,093	19,690,233	19,685,251	19,678,081	19,625,695	19,610,168	17,734,383	16,666,937	19,687,414	18,409,296	16,548,444
Diluted	19,705,242	19,690,233	19,734,195	19,694,973	19,625,695	19,694,379	17,734,383	16,666,937	19,687,414	18,409,296	16,548,444

Income (loss) from continuing operations per basic share attributable to shareholders of parent company.

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Income (loss) from continuing operations per diluted share attributable to shareholders of parent company.

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Net income (loss) attributable to shareholders of parent company.

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Net income (loss) from continuing operations attributable to shareholders of parent company.

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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, 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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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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