Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Revenues:
Revenues	$ 18,213,508	$ 17,343,723	$ 49,312,341	$ 39,585,815
Depreciation:
Depreciation	1,661,740	1,627,258	4,882,899	4,719,769
Interest expense:
Interest expense	74,638	84,289	244,291	244,685
Net income (loss):
Net income (loss)	2,130,736	2,355,102	6,075,889	3,729,267
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	66,699,091		66,699,091		59,436,100
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets	66,699,091		66,699,091		59,436,100
Forged Rolled Rings and Related Components [Member]
Revenues:
Revenues	8,722,683	9,826,210	23,447,214	23,619,875
Depreciation:
Depreciation	1,065,933	1,261,991	3,171,777	3,694,696
Interest expense:
Interest expense	38,428	66,494	118,341	196,690
Net income (loss):
Net income (loss)	1,094,210	1,270,837	3,114,330	2,347,542
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	44,867,148		44,867,148		40,636,142
Dyeing and Finishing Equipment [Member]
Revenues:
Revenues	9,490,825	7,517,513	25,865,127	15,965,940
Depreciation:
Depreciation	595,807	365,267	1,711,122	1,025,073
Interest expense:
Interest expense	36,210	17,795	125,950	47,995
Net income (loss):
Net income (loss)	1,248,012	1,201,156	3,467,999	2,117,296
Identifiable long-lived tangible assets by segment:
Identifiable long-lived tangible assets	21,831,943		21,831,943		18,799,958
Other Segment [Member]
Net income (loss):
Net income (loss)	(211,486)	(116,891)	(506,440)	(735,571)
China [Member]
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets	66,699,091		66,699,091		59,436,100
United States [Member]
Identifiable long-lived tangible assets by geographical location:
Identifiable long-lived tangible assets