Liquidity and Going Concern (Details) $ / shares in Units, $ in Thousands			3 Months Ended
	Apr. 10, 2018 BoardMember	Mar. 30, 2018 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Class of Stock [Line Items]
Expected equity financing investment		$ 17,000
Equity financing cost			$ 844
Accumulated deficit			$ (231,863)	$ (229,406)
Revenue covenants, cure period in the event of default			30 days
Revenue covenants, additional cure period in the event of default			10 days
Broadfin Capital [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Percentage of blocker prior to record date for meeting of shareholders	9.99%
Sabby Management [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Percentage of blocker prior to record date for meeting of shareholders	9.99%
Accelmed Stock Purchase Agreement [Member]
Class of Stock [Line Items]
Breakup fee		$ 600
Closing fee percentage		4.00%
Expected investment advisory fees		$ 692
Expected investment advisory retainer fees		100
Remaining balance of expected investment advisory fees		592
Accelmed Stock Purchase Agreement [Member] | Minimum [Member]
Class of Stock [Line Items]
Professional fees		400
Accelmed Stock Purchase Agreement [Member] | Maximum [Member]
Class of Stock [Line Items]
Professional fees		500
Accelmed Stock Purchase Agreement [Member] | Subsequent Event [Member] | Minimum [Member]
Class of Stock [Line Items]
Number of current board members expected to resign | BoardMember	5
Accelmed Stock Purchase Agreement [Member] | Accelmed Growth Partners L.P. [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 13,000
Share price (in dollars per share) | $ / shares		$ 1.08
Expected equity financing investment (in shares) | shares		12,037,037
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member]
Class of Stock [Line Items]
Preferred stock, conversion price (in dollars per share) | $ / shares		$ 1.296
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Broadfin Capital [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 1,000
Share price (in dollars per share) | $ / shares		$ 1.08
Expected equity financing investment (in shares) | shares		925,926
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Sabby Management [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 1,000
Share price (in dollars per share) | $ / shares		$ 1.08
Expected equity financing investment (in shares) | shares		925,926
Midcap Non-binding Letter of Intent [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 14,000
Percentage of blocker prior to record date for meeting of shareholders		19.99%
Repayment on current facility		$ 3,000
Expected base amount of loan		7,571
Term of loan			48 months
Term for payment of interest only			18 months
Term for payment of principal amount			30 months
Subscription Agreement [Member] | Gohan Investments, Ltd [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 1,000
Share price (in dollars per share) | $ / shares		$ 1.08
Expected equity financing investment (in shares) | shares		925,926
Subscription Agreement [Member] | Dr. Dolev Rafaeli [Member]
Class of Stock [Line Items]
Expected equity financing investment		$ 1,000
Share price (in dollars per share) | $ / shares		$ 1.08
Expected equity financing investment (in shares) | shares		925,926
Term-Note Credit Facility [Member]
Class of Stock [Line Items]
Line of credit outstanding under credit facility agreement			$ 10,279	$ 10,240