Stockholders' Equity - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 06, 2017	Oct. 14, 2015	Mar. 30, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017	Nov. 30, 2016	Mar. 31, 2016	Dec. 15, 2015	Feb. 28, 2015	Jul. 31, 2014
Stockholders Equity Note [Line Items]
Common Stock, shares authorized				100,000,000	100,000,000		100,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				19,000	19,000						10,000	100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights								$ 9.00			$ 9.00	$ 10.00
Common Stock, Shares, Issued				6,052,518	6,052,518		6,033,518
Proceeds from Issuance of Common Stock				$ 0	$ 94,500
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized				$ 616,000	$ 616,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					1 year 7 months 6 days
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price					$ 9.71
Proceeds from Warrant Exercises					$ 85,500	$ 172,000
Common Stock Shares Outstanding				6,052,518	6,052,518		6,033,518
Number Of Warrants Exercised				19,000	19,000
Warrants To Purchase Common Stock Shares								5,000
Class of Warrant or Right, Additinal Number of Securities Called by Warrants or Rights				21,000	21,000
Employee Stock Option [Member]
Stockholders Equity Note [Line Items]
Share-based Compensation					$ 143,000
Series A Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Restricted shares granted to agent		1,111,111
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 9.00
Preferred Stock, Liquidation Preference Per Share		$ 9.00
Preferred Stock, Conversion Basis					The Series A Preferred Stock is mandatorily convertible not sooner than the earlier to occur of (i) the later of (x) January 31, 2017 or (y) 60 days after the date on which the Company files its quarterly report on Form 10-Q for the period ending September 30, 2016, or (ii) the date on which the Company receives the written, irrevocable decision of NMM not to require a redemption of the Series A Preferred Stock, if the Company receive aggregate gross proceeds of not less than $5,000,000 in one or more transactions for the sale of the Companys equity or convertible securities (other than transactions with NMM). The Company has not received at least $5,000,000 in one or more transactions for the sale of its equity or convertible securities to parties other than NMM.
Preferred Stock Shares Authorized				5,000,000	5,000,000		5,000,000
Preferred Stock, Shares Issued				1,111,111	1,111,111		1,111,111
Series B Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Restricted shares granted to agent			555,555
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 10.00
Stock Issued During Period, Value, New Issues			$ 4,999,995
Preferred Stock, Liquidation Preference Per Share			$ 9.00
Preferred Stock, Conversion Basis					(i) at the option of NMM or (ii) mandatorily at any time prior to and including March 30, 2021, if the Company receives aggregate gross proceeds of not less than $5,000,000 in one or more transactions for the sale of the Companys equity or convertible securities (other than transactions with NMM), at an initial conversion rate of one-for-one, subject to adjustment in the event of stock dividends, stock splits and certain other similar transactions. The Company has not received at least $5,000,000 in one or more transactions for the sale of its equity or convertible securities to parties other than NMM.
Preferred Stock Shares Authorized				5,000,000	5,000,000		5,000,000
Preferred Stock, Shares Issued				555,555	555,555		555,555
Series B Warrant [Member]
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									555,555
Class of Warrant or Right, Exercise Price of Warrants or Rights									$ 10.00
warrants 2013 [Member]
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 4.50	$ 4.50
Warrants To Purchase Common Stock Shares								24,000
Series A Warrant [Member]
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									1,111,111
Class of Warrant or Right, Exercise Price of Warrants or Rights									$ 9.00
Directors
Stockholders Equity Note [Line Items]
Share price	$ 9.25
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross	80,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 10.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 572,000
Directors | Maximum
Stockholders Equity Note [Line Items]
Expected volatility rate	134.83%
Risk free interest rate	2.09%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	6 years
Directors | Minimum
Stockholders Equity Note [Line Items]
Expected volatility rate	109.95%
Risk free interest rate	1.53%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	3 years
2015 Equity Incentive Plan
Stockholders Equity Note [Line Items]
Equity incentive plan, shares authorized for issuance				941,000	941,000					1,500,000