Organization and Basis of Presentation - Additional Information (Detail) - USD ($)		12 Months Ended
	May 15, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization And Basis Of Presentation [Abstract]
Month and year of incorporation		2007-01
Cash and cash equivalents		$ 5,663,833	$ 5,319,004	$ 7,679,267
Minimum common stock closing bid price	$ 1.00
Initial period to regain compliance	180 days
Closing bid price description		On May 15, 2019, the Company received a letter from Nasdaq indicating that, for the last thirty consecutive business days, the bid price for the Company’s common stock had closed below the minimum $1.00 per share requirement for continued listing on the Nasdaq Capital Market. In accordance with Nasdaq listing rules, the Company was provided an initial period of 180 calendar days, or until November 11, 2019, to regain compliance. The Nasdaq letter had no immediate effect on the listing or trading of the Company’s common stock and the common stock continued to trade on the Nasdaq Capital Market.