Note 16 - Subsequent Event (Details Textual) - Subsequent Event [Member] $ in Millions	Oct. 31, 2017 USD ($)
Office Space in Shanghai, China [Member]
Contractual Obligation	$ 14.4
Office Space in Hangzhou, China [Member]
Contractual Obligation	$ 16.0

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant