Quarterly report pursuant to Section 13 or 15(d)

Summary of Unvested Restricted Stock Units (Detail)

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Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs) - $ / shares
3 Months Ended
Feb. 06, 2017
Mar. 31, 2017
Shares    
Beginning Balance   418,511
Granted 80,000 1,080,000
Vested   (94,761)
Ending Balance   1,403,750
Weighted Average Grant Date Fair Value    
Beginning Balance   $ 1.23
Granted   1.55
Vested   1.13
Ending Balance   $ 1.48