Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Additional Information (Detail)

Stock-based Compensation - Additional Information (Detail) - USD ($)				1 Months Ended	3 Months Ended								6 Months Ended
	Jun. 06, 2016	Feb. 15, 2016	Mar. 16, 2015	Mar. 31, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards							300,000				10,000		700,000	910,000
Weighted-average grant date fair value							$ 0.58				$ 0.77		$ 0.72	$ 1.29
Stock options vested													256,667
Stock options forfeited													373,333
Number of stock options, exercised													0
Non-employee Directors [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Annual retainer amount for the threshold of stock precluded from selling													$ 270,000
Dr. Alan Joslyn [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards	300,000
Stock options vested	50,000
Restricted shares ending date	The Company issued (i) stock options to purchase 300,000 shares of the Company's common stock at an exercise price equal to $0.55 per share which stock options shall vest in six installments of 50,000 shares each every six months after June 6, 2016, provided that he has continued his employment with the Company through such dates, and (ii) 30,000 shares of restricted stock of the Company, vesting in two installments on the six month and twelve month anniversaries of June 6, 2016.
Exercise price of plan	$ 0.55
Dr. Alan Joslyn [Member] \| Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted shares vest in each quarter end	30,000
2012 Equity Incentive Plan [Member] \| Chief Financial Officer [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards			200,000
Exercise price of plan			$ 1.32
Vesting period			3 years
2012 Equity Incentive Plan [Member] \| Non-employee Directors [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards		80,000		80,000
Exercise price of plan		$ 0.84		$ 1.32
2012 Equity Incentive Plan [Member] \| Non-employee Directors [Member] \| Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted shares awarded		40,000		40,000
Restricted shares ending date		Under the Company's 2012 Plan, of which 10,000 restricted shares vest at the end of each calendar quarter in 2016, provided the recipient remains a director through the vesting date.											Under the Company's 2012 Plan, of which 10,000 restricted shares vested at the end of each calendar quarter in 2015, provided the recipient remained a director through the vesting date.
Restricted shares vest in each quarter end							10,000	10,000	10,000	10,000	10,000	10,000	10,000
2012 Equity Incentive Plan [Member] \| Scenario, Forecast [Member] \| Non-employee Directors [Member] \| Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted shares vest in each quarter end					10,000	10,000
Discovery Research [Member] \| 2012 Equity Incentive Plan [Member] \| Senior Vice President [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards			150,000
Exercise price of plan			$ 1.32
Vesting period			3 years