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
	Feb. 15, 2016	Mar. 16, 2015	Mar. 31, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards							400,000				900,000
Weighted-average grant date fair value							$ 0.82				$ 1.30
Stock options vested							0
Stock options forfeited							0
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
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 which 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
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	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