COMMON STOCK WARRANTS - Schedule Of Common Stock Warrant Activity (Detail) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Option Plan [Member]
Number of Options
Number of Options Outstanding, beginning	1,494	1,397
Number of Options, Issued	0	0
Number of Options, Exercised	0	1
Number of Options Outstanding, ending	1,482	1,396
Weighted Average Exercise Price
Weighted Average Exercise Price, beginning	$ 12.33	$ 13.57
Weighted Average Exercise Price, Issued	0	0
Weighted Average Exercise Price, Exercised	0	0.92
Weighted Average Exercise Price, ending	$ 12.17	$ 13.58
Warrant [Member]
Number of Options
Number of Options Outstanding, beginning	1,842	60
Number of Options, Issued	0	0
Number of Options, Exercised	0	0
Number of Options, Expired	0	0
Number of Options, Modification	0	0
Number of Options Outstanding, ending	1,842	60
Weighted Average Exercise Price
Weighted Average Exercise Price, beginning	$ 0.59	$ 2.52
Weighted Average Exercise Price, Issued	0	0
Weighted Average Exercise Price, Exercised	0	0
Weighted Average Exercise Price, Expired	0	0
Weighted Average Exercise Price, Modification	0	0
Weighted Average Exercise Price, ending	$ 0.59	$ 2.52