Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies (Details Textual)

v2.4.1.9
Organization and Summary of Significant Accounting Policies (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]        
Non-cash (gain) loss on changes in fair value of warrants $ 1,083,000us-gaap_FairValueAdjustmentOfWarrants $ 1,737,000us-gaap_FairValueAdjustmentOfWarrants $ (1,766,000)us-gaap_FairValueAdjustmentOfWarrants  
Cash and Cash Equivalents, at Carrying Value 15,470,000us-gaap_CashAndCashEquivalentsAtCarryingValue 11,798,000us-gaap_CashAndCashEquivalentsAtCarryingValue 18,102,000us-gaap_CashAndCashEquivalentsAtCarryingValue 5,406,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Share-based Compensation 543,000us-gaap_ShareBasedCompensation 678,000us-gaap_ShareBasedCompensation 2,581,000us-gaap_ShareBasedCompensation  
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 2,400,000us-gaap_ComprehensiveIncomeNetOfTax $ 9,700,000us-gaap_ComprehensiveIncomeNetOfTax $ 15,200,000us-gaap_ComprehensiveIncomeNetOfTax