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Subsequent Events - Additional Information (Detail) - BTIG LLC [Member] - Subsequent Event [Member]
$ / shares in Units, $ in Thousands
Apr. 01, 2017
USD ($)
$ / shares
shares
Sale of stock, number of shares sold in transaction | shares 645,271
Proceeds from sale of common stock | $ $ 2,211
Sale of stock, price per share | $ / shares $ 3.53