Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

v2.4.1.9
Note 2 - Summary of Significant Accounting Policies (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Cash and Cash Equivalents, at Carrying Value $ 59,866,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 44,816,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 23,334,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 14,550,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 88,097us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount      
CHINA        
Cash and Cash Equivalents, at Carrying Value $ 5,300,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= country_CN