Subsequent Events - Additional Information (Detail)							2 Months Ended	12 Months Ended
	Jan. 31, 2018 USD ($)	Jan. 30, 2018 USD ($) $ / shares shares	Jan. 26, 2018 USD ($) Payment	Aug. 11, 2017 USD ($) $ / shares	Aug. 09, 2017 USD ($) $ / shares	Oct. 19, 2016 USD ($)	Mar. 28, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 08, 2017 $ / shares	Mar. 31, 2017 $ / shares	May 04, 2016 $ / shares
Subsequent Event [Line Items]
Fixed asset purchases								$ 1,400,180	$ 482,065
Proceeds from issuance of common stock, net of issuance costs					$ 2,000,000	$ 9,000,000
Exercise price of warrants | $ / shares				$ 1.50	$ 1.50					$ 0.85	$ 2.50	$ 3.90
Proceeds from exercise of common stock warrants				$ 0		$ 564		$ 7,498,535
Subsequent Event [Member]
Subsequent Event [Line Items]
Fixed asset purchases			$ 250,000
Number of lease payments | Payment			22
Lease payments per month			$ 11,081
Lease agreements initial terms			3 years
Equipment purchases							$ 78,000
Subsequent Event [Member] | Follow-on Public Offering [Member]
Subsequent Event [Line Items]
Proceeds from issuance of common stock, net of issuance costs		$ 13,300,000
Private offering, number of common stock and warrants issued | shares		32,854,606
Stock price | $ / shares		$ 0.45
Exercise price of warrants | $ / shares		$ 0.50
Class of warrant or rights, term		5 years
Proceeds from exercise of common stock warrants	$ 0	$ 0
Subsequent Event [Member] | Follow-on Public Offering [Member] | Maximum [Member]
Subsequent Event [Line Items]
Issuance of warrants to purchase shares of common stock | shares		32,854,606