Organization and Summary of Significant Accounting Policies (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Cash balances by geographic area
Total cash and cash equivalents	$ 18,948,981	$ 18,790,370	$ 12,855,900	$ 7,835,791
Total cash and cash equivalents, percentage	100.00%	100.00%
United States [Member]
Cash balances by geographic area
Total cash and cash equivalents	$ 8,495	$ 13,142
Total cash and cash equivalents, percentage	0.04%	0.10%
China [Member]
Cash balances by geographic area
Total cash and cash equivalents	$ 18,940,486	$ 18,777,228
Total cash and cash equivalents, percentage	99.96%	99.90%