3. Fair Value Measurement (Details) (USD $)	Jun. 30, 2014
Cash and cash equivalents	$ 5,902,228
Available-for-sale investments	6,012,309
Assets measured at fair value at June 30, 2014	11,914,537
Level 1
Cash and cash equivalents	5,902,228
Available-for-sale investments	6,012,309
Assets measured at fair value at June 30, 2014	11,914,537
Level 2
Cash and cash equivalents	0
Available-for-sale investments	0
Assets measured at fair value at June 30, 2014	$ 0