Redeemable Convertible Preferred Stock (Details)								1 Months Ended		3 Months Ended
	May 10, 2017 USD ($) $ / shares	Nov. 22, 2016 USD ($) $ / shares	Jun. 20, 2016 shares	Jun. 03, 2016 USD ($) $ / shares	Apr. 08, 2016 USD ($) $ / shares shares	Apr. 07, 2016 $ / shares	Jun. 13, 2013 $ / shares shares	May 31, 2017 USD ($) $ / shares shares	Jun. 30, 2016 shares	Mar. 31, 2017 USD ($) $ / shares shares	Apr. 07, 2016 USD ($) $ / shares	Dec. 31, 2016 USD ($)	Nov. 30, 2016 $ / shares shares
Class of Stock [Line Items]
Amount reclassified to Series B from APIC to adjust redemption value											$ 1,858,000
Shares of common stock issued upon conversion of preferred stock | shares					150,556
Exercise price of warrants | $ / shares										$ 22.86
Derivative liability										$ 2,329,000		$ 2,443,000
Liability fair value adjustment										(114,000)
Dividends payable										38,000
Common Stock Issuance Agreement [Member]
Class of Stock [Line Items]
Trigger price per share for requirement to issue additional shares of common stock | $ / shares					$ 40.50
Shares issued per agreements | shares					85,346				75,020
Exercise price of warrants | $ / shares					$ 40.50	$ 70.00					$ 70.00
Cash payments in respect of accrued dividends					$ 2,200,000
Warrant expiration date					Mar. 31, 2021	Jun. 26, 2018
Gross proceeds benchmark for expiration of obligation to issue shares										$ 10,000,000
Future shares of common stock approved to be issued per agreement | shares			103,705							28,684
Derivative liability					$ 2,300,000
Liability fair value adjustment				$ 1,500,000
Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Combined per share purchase price of shares and warrants issued | $ / shares		$ 7.50		$ 23.50
Proceeds from issuance of common stock and warrants		$ 4,000,000		$ 5,000,000
Public Offering of Warrants and Common Stock [Member]
Class of Stock [Line Items]
Exercise price of warrants | $ / shares		$ 7.50
Proceeds from issuance of common stock and warrants		$ 3,300,000
Derivative liability		$ 2,900,000								$ 1,961,000
Liability fair value adjustment										(82,000)
Sale of stock, price per share | $ / shares		$ 7.50											$ 7.50
Number of shares contingently issuable to Holders per CSIA | shares													222,407
Dilutive Financing Derivative Liability [Member]
Class of Stock [Line Items]
Derivative liability										123,000		126,000
Liability fair value adjustment										(3,000)
Dilutive Financing Derivative Liability [Member] | Common Stock Issuance Agreement [Member]
Class of Stock [Line Items]
Derivative liability										$ 123,000		$ 126,000
Subsequent Event [Member]
Class of Stock [Line Items]
Proceeds from issuance of common stock and warrants								$ 9,100,000
Subsequent Event [Member] | Public Offering of Warrants and Common Stock [Member]
Class of Stock [Line Items]
Exercise price of warrants | $ / shares	$ 1.50							$ 0.01
Proceeds from issuance of common stock and warrants	$ 9,100,000
Sale of stock, price per share | $ / shares	$ 1.49							$ 1.49
Number of shares contingently issuable to Holders per CSIA | shares								329,762
Subsequent Event [Member] | November 2016 and May 2017 Public Offerings [Member]
Class of Stock [Line Items]
Number of shares contingently issuable to Holders per CSIA | shares								552,169
Shares issued to Holders pursuant to CSIA | shares								0
Series B Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized | shares							9,357,935
Preferred Stock, initial stated value per share | $ / shares							$ 1.40
Preferred Stock, par value per share | $ / shares							$ 0.01
Number of shares of common stock for which each Series B share can be converted						0.02
Preferred Stock dividend rate							10.00%
Trigger price per share for redemption and conversion features of derivative | $ / shares							$ 70.00
Number of shares converted | shares					7,527,853