CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 32,733,042	$ 29,655,360
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,267,623	2,201,020
Amortization	216,971	208,237
Loss on sale of property, plant and equipment	90,261	60,540
Allowance for doubtful accounts - accounts receivable, net	0	23,656
Allowance for doubtful accounts - other receivables and prepayments	0	796
Write-down of obsolete inventories	59,560	4,576
Deferred tax (benefit) expense	(887,184)	502,563
Share-based compensation	4,569,395	1,969,973
Equity in loss of an equity method investee	216,315	95,067
Change in operating assets and liabilities:
Accounts receivable	(5,267,385)	(9,178,096)
Prepayment and other current assets	2,554,632	(1,638,307)
Inventories	(3,869,727)	(1,889,100)
Accounts payable	(3,696,808)	482,077
Other payables and accrued expenses	(8,282,055)	(5,672,053)
Deferred income	(127,705)	(74,749)
Income tax payable	3,654,815	(209,688)
Net cash provided by operating activities	24,231,750	16,541,872
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for property, plant and equipment	(13,672,613)	(8,478,369)
Payment for intangible assets and land use rights	(967,636)	0
Refund of deposits related to land use right	994,815	0
Proceeds from sale of property, plant and equipment and land use rights	63,397	6,219
Long-term loan lent to a third party	(6,331,518)	0
Net cash used in investing activities	(19,913,555)	(8,472,150)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock option exercised	0	449,741
Repayment of short-term bank loans	0	(31,610,360)
Maturity of deposit as security for bank loans	37,756,405	31,985,122
Dividend paid by subsidiaries to noncontrolling interest shareholders	(7,921,952)	0
Dividend to the trial court to be held in escrow as to dispute with Jie’an	0	(2,988,194)
Net cash provided by (used in) financing activities	29,834,453	(2,163,691)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES ON CASH	1,026,211	(738,659)
NET INCREASE IN CASH AND CASH EQUIVALENTS	35,178,859	5,167,372
Cash and cash equivalents at beginning of period	144,937,893	80,820,224
Cash and cash equivalents at end of period	180,116,752	85,987,596
Supplemental cash flow information
Cash paid for income taxes	3,867,715	5,373,179
Cash paid for interest expense	0	660,018
Noncash investing and financing activities:
Acquisition of property, plant and equipment included in payables	$ 3,087,289	$ 189,074