Debt and Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	Mar. 06, 2018	Jan. 30, 2018	Jan. 29, 2018	Mar. 31, 2018
Debt And Fair Value Of Financial Instruments [Line Items]
Warrant liability	$ 2,900,000			$ 3,000,000
Secured Promissory Note [Member] | Steven L. and Monique P. Elfman [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Notes due date		Feb. 11, 2018	Aug. 18, 2017
Secured Promissory Note [Member] | William W. Smith, Jr. and Dieva L. Smith [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Notes due date		Jul. 25, 2018	Jun. 26, 2017
Debt instrument extended maturity date	Mar. 25, 2020
Secured Promissory Note [Member] | Next Generation TC FBO Andrew Arno IRA 1663 [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Notes due date		Jul. 25, 2018	Aug. 24, 2017
Debt instrument extended maturity date	Mar. 25, 2020
Secured Promissory Note [Member] | Andrew Arno [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Notes due date		Jul. 25, 2018	Aug. 24, 2017
Debt instrument extended maturity date	Mar. 25, 2020
Private Placement [Member] | Common Stock [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Common shares issued in stock offering, net offering costs, shares	2,857,144
Common stock, price per share	$ 1.75
Offering [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Gross proceeds before deducting placement agent fee and offering expenses	$ 5,000,000
Offering [Member] | Common Stock [Member]
Debt And Fair Value Of Financial Instruments [Line Items]
Common stock exercise price	$ 2.17