Business Combinations - Supplemental Proforma Combined Net Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Business Combinations [Abstract]
Net Income (Loss)	$ (169)	$ 1,192	$ (831)	$ 504
Add: Results of operations of acquired business	88	(147)	183	(79)
Less: pro forma adjustments
Amortization of intangibles	(31)	(130)	(94)	(187)
Inventory fair value adjustments	283	(213)	283	(427)
Acquisition related expenses	121	0	304	(304)
Interest (expense) income	(7)	(9)	(14)	(34)
Net Income (Loss) - pro forma combined	$ 285	$ 693	$ (169)	$ (527)