Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Accounts receivable, net of allowance $ 66 $ 19
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, authorized 10,000 10,000
Liquidation preference $ 18,075
Common stock, par value $ 0.001 $ 0.001
Common stock, authorized 300,000 300,000
Common stock, issued 43,954 43,985
Common stock, outstanding 43,954 43,985
Nonvoting Common Stock [Member]    
Common stock, par value $ 0.001 $ 0.001
Common stock, authorized 3,553 3,553
Common stock, issued 1 1
Common stock, outstanding 1 1
Series A Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, authorized 1,684 1,684
Preferred stock, issued
Preferred stock, outstanding
Series B Preferred Stock [Member]    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, authorized 1,581 1,581
Preferred stock, issued 927 927
Preferred stock, outstanding 927 927