Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.7.0.1
Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
item
shares
Dec. 31, 2015
USD ($)
Dec. 06, 2015
shares
Accounting Policies [Abstract]      
Realized gains or losses from sale of marketable securities   $ 8  
Restricted cash current, standby letters of credit $ 101 $ 193  
Issuance of letters of credit for insurance policy coverage 50    
Restricted cash related credit card facility $ 51    
Property and equipment, estimated useful lives 3 years    
Issuance of warrant to purchase shares of common stock | shares 460   125,000
Number of operating segments | item 1