Private Placement - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Jun. 15, 2016	Apr. 14, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 16, 2016	Jan. 30, 2015
Private Placement [Line Items]
Securities purchase agreement private placement units description			On April 14, 2016, the Company completed a Private Placement transaction for the offering of 591,860 Units. Each Unit was comprised of: (i) one share of Common Stock, (ii) five shares of Series A Preferred, and (iii) three warrants, each to purchase one share of Common Stock. The purchase price was $23.94 per Unit (the equivalent of $3.99 per share of Common Stock, assuming conversion of the Series A Preferred).
Common stock shares issued under private placement offer		591,860
Private placement offer price per share		$ 23.94
Common stock purchase price		$ 3.99
Proceeds from issuance of private placement offer		$ 14,200	$ 20,619	$ 0
Aggregate payment of Placement agent, escrow agents and legal fees		$ 1,800
Additional issued units			334,169
Private Placement [Member]
Private Placement [Line Items]
Securities purchase agreement private placement units description			On April 14, 2016, the Company completed the sale of 591,860 units (“Units”) to certain accredited investors (the “Private Placement”) at a purchase price of $23.94 per Unit. Each Unit was comprised of (i) one share of the Company’s common stock, (ii) five shares of Series A Mandatorily Convertible Preferred Stock (“Series A Preferred”), and (iii) three warrants, each to purchase one share of the Company’s common stock.
Common stock shares issued under private placement offer	334,169	591,860
Private placement offer price per share		$ 23.94
Proceeds from issuance of private placement offer	$ 8,000	$ 14,200
Placement fees		$ 1,100
M.M. Dillon & Co. Group [Member]
Private Placement [Line Items]
Warrant to purchase stock, shares		100,000
Placement fees		$ 200
Majority Shareholder [Member] | Allenex [Member]
Private Placement [Line Items]
Number of common stock purchased | shares			1,002,507
Shares of common stock subject to outstanding common stock warrants [Member]
Private Placement [Line Items]
Proceeds from issuance of private placement offer		3,000	$ 1,700
Warrant to purchase stock, shares					200,000
Common Stock [Member]
Private Placement [Line Items]
Proceeds from issuance of private placement offer		1,900	1,000
Warrant to purchase stock, shares						34,483
Series A Preferred Stock
Private Placement [Line Items]
Proceeds from issuance of private placement offer		$ 9,300	$ 5,300
Convertible preferred stock shares issued upon conversion					1
Preferred shares convertible to common stock | shares			1,670,845
Series A Preferred Stock | Private Placement [Member]
Private Placement [Line Items]
Convertible preferred stock shares issued upon conversion		1