Warrants (Narrative) (Details)					1 Months Ended		3 Months Ended	4 Months Ended	12 Months Ended
	Aug. 03, 2015 USD ($) shares	Apr. 29, 2015 USD ($) shares	Apr. 01, 2015 USD ($) shares	Mar. 16, 2015 USD ($) $ / shares shares	Dec. 31, 2013 $ / shares shares	Jul. 15, 2013 USD ($) $ / shares shares	Mar. 31, 2015 USD ($)	May. 31, 2013 $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Aug. 02, 2015 shares	May. 08, 2015 USD ($)	Dec. 22, 2011 $ / shares shares
Class of Warrant or Right [Line Items]
Sale of stock, price per share | $ / shares									$ 3.98
Warrant expiration date								February through May 2018
Warrant liability									$ 6,000	$ 5,826,000
Amount reclassified from warrant liability into equity	$ 3,281,000	$ 46,000	$ 630,000									$ 5,462,000
Reverse stock split, description	1-for-50 (1:50) reverse stock split of its common stock, par value $0.01 per share
Conversion ratio of reverse stock split	50
Common stock, shares authorized | shares	670,000,000								670,000,000	670,000,000	445,000,000
Fair value of liquidated damages reclassified to shareholders' equity	$ 120,000
Gain (loss) on remeasurement of fair value of warrant liability									$ 610,000	$ 9,455,000
Warrant issuance expense									(213,000)
Series March 2015 Warrants [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares				393,939
Exercise price of warrants | $ / shares				$ 10.75
Series B Placement - June 26, 2013 Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant liability						$ 4,285,000
Warrants exercised | shares		4,525	52,120
Shares issued upon exercise of warrants | shares		4,525	52,120
Series B Placement - July 15, 2013 Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant liability						$ 674,000
Placement Agent [Member]
Class of Warrant or Right [Line Items]
Warrant liability				$ 814,000
Other expenses related to issuance of warrants							$ 213,000		$ 218,000
Down Round Position [Member]
Class of Warrant or Right [Line Items]
Exercise price of warrants | $ / shares				$ 8.25
Biocontrol Business Combination [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares													27,103
Exercise price of warrants | $ / shares													$ 23.00
Warrant expiration date									December 2016
Convertible Notes Payable [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares								140,608
Exercise price of warrants | $ / shares								$ 7.00
Private Placement [Member]
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued in transaction | shares				1,575,758	1,440,140
Sale of stock, price per share | $ / shares				$ 8.25	$ 12.50
Warrant liability				$ 4,210,000
Other expenses related to issuance of warrants				$ 213,000
Private Placement [Member] | Series March 2015 Warrants [Member]
Class of Warrant or Right [Line Items]
Exercise price of warrants | $ / shares				$ 10.75
Warrant expiration date				March 2020
Warrant liquidation charges if warrants not exercised according to terms				$ 2,500,000
Warrant liability				$ 3,396,000
Private Placement [Member] | Series December 2013 Warrants [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares					86,408
Exercise price of warrants | $ / shares					$ 12.50
Warrant expiration date					December 2018
Private Placement [Member] | Placement Agent [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares				94,545
Exercise price of warrants | $ / shares				$ 10.75
Private Placement - Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Number of securities called by warrants | shares						600,805
Exercise price of warrants | $ / shares						$ 7.00
Private Placement - Series B Preferred Stock [Member] | Series B Placement - June 26, 2013 Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant expiration date						June 2018
Private Placement - Series B Preferred Stock [Member] | Series B Placement - July 15, 2013 Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant expiration date						July 2018
Private Placement - Series B Preferred Stock [Member] | Placement Agent [Member]
Class of Warrant or Right [Line Items]
Warrant issuance expense						$ 759,000