Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2017	Mar. 07, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 19, 2016	Mar. 09, 2016
Class of Stock [Line Items]
Common stock, par value (in dollars per share)					$ 0.0001	$ 0.0001
Closing price of shares (in dollars per share)								$ 14.32
Compensation cost not yet recognized					$ 461,547
Compensation cost not yet recognized, period for recognition					2 years 9 months 18 days
Series E Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)					7,000	0
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)					14,052.93
Shares converted				5,405.975	3,149.72	4,097.35
Convertible preferred stock, shares issued upon conversion				374,375
Series D Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)					14,052.93	17,202.65
2017 Offering
Class of Stock [Line Items]
Net proceeds from issuance of stock and warrants			$ 7,000,000
Net proceeds from issuance of stock and warrants			$ 6,300,000
2017 Offering | Series E Convertible Preferred Stock
Class of Stock [Line Items]
Shares issued during period (in shares)			7,000
Shares issued (in dollars per share)			$ 1,000		$ 1,000
Convertible preferred stock, conversion price (in dollars per share)					$ 5.60
Dividends, preferred stock, total			$ 4,000,000
2017 Offering | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)					14,052.93
Shares converted					3,149.72
2017 Offering | Series D Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)			19,458.90
2016 Issuance | Series D Preferred Stock
Class of Stock [Line Items]
Shares issued (in dollars per share)	$ 1,000
Shares issued during period (in shares)	21,300
2015 Offering | Series C Preferred Stock
Class of Stock [Line Items]
Shares redeemed during period (in shares)	13,800
2016 Offering
Class of Stock [Line Items]
Net proceeds from issuance of stock and warrants	$ 7,500,000
Net proceeds from issuance of stock and warrants	$ 6,700,000
2016 Offering | Series D Preferred Stock
Class of Stock [Line Items]
Shares issued (in dollars per share)	$ 1,000
Convertible preferred stock, conversion price (in dollars per share)	$ 14.44
2016 Offering | Series C Preferred Stock
Class of Stock [Line Items]
Dividends, preferred stock, total	$ 19,800,000
Common Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion					255,625	283,750
Additional shares owed to investor							590,977
Maximum percent of outstanding common stock owned by investor				4.99%
Conversion of preferred stock, common shares delivered					590,978
Conversion of preferred stock, common shares undelivered					0
Common Stock | 2017 Offering
Class of Stock [Line Items]
Shares of common stock available to purchase			1,250,000
Common stock, par value (in dollars per share)			$ 0.0001
Number of securities available to purchase by warrants, held by investor			2,934,484
Convertible preferred stock, shares issued upon conversion					218,125
Common Stock | 2016 Issuance
Class of Stock [Line Items]
Shares of common stock available to purchase	1,475,069
Common stock, par value (in dollars per share)	$ 0.0001
Common Stock | 2016 Offering
Class of Stock [Line Items]
Exercise price of warrants or rights (in dollars per share)	$ 13.52
Warrants | 2017 Offering
Class of Stock [Line Items]
Exercise price of warrants or rights (in dollars per share)			$ 5.60
Class of warrant exercisable period			5 years
Warrants not settleable in cash, fair value disclosure			$ 3,490,000
Exercise price (in dollars per share)			$ 4.96
Expected volatility			70.20%
Risk free interest rate			2.04%
Expected Term			5 years
Expected dividends			0.00%
2015 Management Incentive Compensation | 2016 Issuance
Class of Stock [Line Items]
Shares issued during period (in shares)		22,260
Stock issued during period, value		$ 318,761