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Consolidated Statements of Shareholders' Equity - USD ($)
Series A Cumulative Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income [Member]
Total
Beginning at Dec. 31, 2013 $ 1,000 $ 393,000 $ 121,432,000 $ (456,000) $ (112,799,000) $ 631,000 $ 9,202,000
Beginning, shares at Dec. 31, 2013 156,000 78,649,000          
Foreign currency translation adjustment           (152,000) (152,000)
Net loss         (5,030,000)   (5,030,000)
Net proceeds from issuance of common stock related to public offering   $ 64,000 6,305,000       6,369,000
Net proceeds from issuance of common stock related to public offering, shares   12,765,000          
Issuance of common stock upon exercise of stock options   $ 1,000 43,000       44,000
Issuance of common stock upon exercise of stock options, shares   228,000          
Issuance of common stock upon vesting of restricted stock units   $ 1,000 (34,000)       (33,000)
Issuance of common stock upon vesting of restricted stock units, shares   119,000          
Issuance of common stock in lieu of payment to consultant   $ 3,000 239,000       $ 242,000
Issuance of common stock in lieu of payment to consultant, shares   574,000          
Issuance of stock in lieu of dividends     16,000   (16,000)  
Issuance of stock in lieu of dividends, shares   35,000          
Non-cash stock based compensation     282,000       $ 282,000
Balance at Dec. 31, 2014 $ 1,000 $ 462,000 128,283,000 $ (456,000) (117,845,000) 479,000 10,924,000
Balance, shares at Dec. 31, 2014 156,000 92,370,000          
Foreign currency translation adjustment           $ (307,000) (307,000)
Net loss         (7,226,000) $ (7,226,000)
Net proceeds from issuance of common stock related to public offering, shares             12,765,000
Issuance of common stock upon exercise of stock options             $ 1,000
Issuance of common stock upon exercise of stock options, shares   20,000          
Issuance of common stock in lieu of payment to consultant     1,000       $ 1,000
Issuance of common stock in lieu of payment to consultant, shares   3,000          
Issuance of stock in lieu of dividends     16,000 (16,000)  
Issuance of stock in lieu of dividends, shares   46,000      
Non-cash stock based compensation     456,000       $ 456,000
Balance at Dec. 31, 2015 $ 1,000 $ 462,000 $ 128,756,000 $ (456,000) $ (125,087,000) $ 172,000 $ 3,848,000
Balance, shares at Dec. 31, 2015 156,000 92,439,000