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 tables provide a reconciliation of Warrant liability, Additional paid-in capital, Accumulated deficit and Change in fair value of warrant liability on the consolidated balance sheets as of September 30, 2016, December 31, 2016, March 31, 2017, and June 30, 2017 (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	)

	Consolidated Balance Sheet
	Related-party notes payable		Notes payable		Warrant liability			Additional paid-in capital			Accumulated deficit
Balance, March 31, 2017 (Prior to    adoption of ASU 2017-11)	$	1,062	$	1,062	$	502		$	228,265		$	(227,629	)
Change in valuation of notes payable		298		298		—			(596	)		—
Reclassification of warrant liability		—		—		(502	)		502			—
Change in fair value of warrant liability		—		—		—			1,618			(1,618	)
Change in interest (expense) income, net		—		—		—			(139	)		139
Balance, March 31, 2017 (After adoption    of ASU 2017-11)	$	1,360	$	1,360	$	—		$	229,650		$	(229,108	)

	Consolidated Balance Sheet
	Related-party notes payable		Notes payable		Warrant liability			Additional paid-in capital			Accumulated deficit
Balance, June 30, 2017 (Prior to    adoption of ASU 2017-11)	$	1,158	$	1,158	$	1,063		$	230,657		$	(230,203	)
Change in valuation of notes payable		267		267		—			(534	)		—
Reclassification of warrant liability		—		—		(1,063	)		1,063			—
Change in fair value of warrant liability		—		—		—			1,060			(1,060	)
Change in interest (expense) income, net		—		—		—			(200	)		200
Balance, June 30, 2017 (After adoption    of ASU 2017-11)	$	1,425	$	1,425	$	—		$	232,046		$	(231,063	)