Quarterly report pursuant to Section 13 or 15(d)

Organization (Details Textual)

v3.8.0.1
Organization (Details Textual) - USD ($)
shares in Thousands, $ in Thousands
 1 Months Ended 9 Months Ended
Aug. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Organization [Line Items]          
Retained Earnings (Accumulated Deficit), Total   $ (135,176)   $ (114,861)  
Cash and Cash Equivalents, at Carrying Value   33,439 $ 12,800 $ 16,846 $ 19,552
Net Cash Provided by (Used in) Operating Activities   $ (25,582) $ (20,555)    
Substantial Doubt about Going Concern, Management's Plans, Substantial Doubt Alleviated   In 2017, management has taken several actions to alleviate the substantial doubt about the Company’s ability to continue as a going concern that existed as on the date of issuance of the December 31, 2016 consolidated financial statements including but not limited to the following: streamlining its operations and reducing its workforce by approximately 27 employees to lower operating expenses and reduce cash burn. sold an aggregate of 3,732 shares of its common stock in a registered direct offering for net proceeds of $10,919. sold an aggregate of 13,465 shares of its common stock in a rights offering for net proceeds of $13,179 and 20,535 shares of its common stock to the backstop investor in a private placement in conjunction with the rights offering for proceeds of $20,535. The Company intends to use these proceeds to broaden its footprint in Asia, support research, development and commercialization activities, and for working capital.      
Registered Direct Offering [Member]          
Organization [Line Items]          
Stock Issued During Period, Shares, New Issues   3,732      
Proceeds from Issuance of Common Stock   $ 10,919      
Rights Offering [Member]          
Organization [Line Items]          
Stock Issued During Period, Shares, New Issues 13,465 13,465      
Proceeds from Issuance of Common Stock $ 13,179 $ 13,179      
Private Placement [Member]          
Organization [Line Items]          
Stock Issued During Period, Shares, New Issues   20,535      
Proceeds from Issuance of Private Placement   $ 20,535