Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Oct. 01, 2016	Dec. 31, 2016	[1]
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying value of goodwill		$ 533,000		$ 533,000
Impairment of goodwill		0
Amortization expense		12,000	$ 12,000
Proceeds from sale of intellectual property	$ 175,000	$ 175,000

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended December 31, 2016.