Equity Transactions (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Schedule of Reconciliation of Warrant Liability, Additional Paid-in Capital, Accumulated Deficit and Change in Fair Value of Warrant Liability on Balance Sheets

The following table provides a reconciliation of Warrant liability, Additional paid-in capital, Accumulated deficit and Change in fair value of warrant liability on the consolidated balance sheets for the three months ended September 30, 2016 and the year ended December 31, 2016 (in thousands):

	Consolidated Balance Sheet
	Related-party notes payable		Notes payable		Warrant liability			Additional paid-in capital			Accumulated deficit
Balance, September 30, 2016 (Prior to    adoption of ASU 2017-11)	$	883	$	883	$	1,761		$	227,565		$	(222,185	)
Change in valuation of notes payable		359		359		—			(718	)		—
Reclassification of warrant liability		—		—		(1,761	)		1,761			—
Change in fair value of warrant liability		—		—		—			335			(335	)
Change in interest (expense) income, net		—		—		—			(17	)		17
Balance, September 30, 2016 (After adoption    of ASU 2017-11)	$	1,242	$	1,242	$	—		$	228,926		$	(222,503	)

	Consolidated Balance Sheet
	Related-party notes payable		Notes payable		Warrant liability			Additional paid-in capital			Accumulated deficit
Balance, December 31, 2016 (Prior to    adoption of ASU 2017-11)	$	967	$	967	$	1,210		$	227,889		$	(225,397	)
Change in valuation of notes payable		328		328		—			(656	)		—
Reclassification of warrant liability		—		—		(1,210	)		1,210			—
Change in fair value of warrant liability		—		—		—			910			(910	)
Change in interest (expense) income, net		—		—		—			(79	)		79
Balance, December 31, 2016 (After adoption    of ASU 2017-11)	$	1,295	$	1,295	$	—		$	229,274		$	(226,228	)