Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Revenues:
Revenues	$ 17,214,134	$ 12,832,863	$ 31,098,833	$ 22,242,092
Depreciation:
Depreciation	1,651,608	1,545,166	3,221,159	3,092,511
Interest expense:
Interest expense	64,526	70,363	169,653	160,396
Net income (loss):
Net income (loss)	2,322,553	1,071,370	3,945,153	1,374,165
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	64,141,009		64,141,009		59,436,100
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets	64,141,009		64,141,009		59,436,100
Forged Rolled Rings and Related Components [Member]
Revenues:
Revenues	8,197,830	8,208,210	14,724,531	13,793,665
Depreciation:
Depreciation	1,059,267	1,215,536	2,105,844	2,432,705
Interest expense:
Interest expense	32,761	52,563	79,913	130,196
Net income (loss):
Net income (loss)	1,223,554	750,036	2,020,120	1,076,705
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	43,279,304		43,279,304		40,636,142
Dyeing and Finishing Equipment [Member]
Revenues:
Revenues	9,016,304	4,624,653	16,374,302	8,448,427
Depreciation:
Depreciation	592,341	329,630	1,115,315	659,806
Interest expense:
Interest expense	31,765	17,800	89,740	30,200
Net income (loss):
Net income (loss)	1,258,828	506,797	2,219,987	916,140
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	20,861,705		20,861,705		18,799,958
Other Segment [Member]
Net income (loss):
Net income (loss)	(159,829)	(185,463)	(294,954)	(618,680)
China [Member]
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets	64,141,009		64,141,009		59,436,100
United States [Member]
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets