Supplemental Disclosure of Noncash Investing and Financing Activities - Supplemental Disclosure of Noncash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investing activities:
Acquisition-related contingent consideration			$ 10,611
Common stock issued in connection with the acquisition			2,764
Capital expenditures incurred not yet paid	$ 1,082	$ 344	755
Stock-based compensation included in capital expenditures	650	502	453
Financing activities:
Common stock issued as form of payment for MPUs	503	827
Common stock issued as payment for contingent consideration			347
Series A convertible preferred stock dividend paid-in-kind	$ 12	$ 18	$ 12