Segment Information (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment reporting information revenue [Abstract]
Revenues		$ 4,919,491	$ 15,646,465
Depreciation		1,674,728	2,074,507
Interest expense		55,714	57,343
Net income (loss)		(844,093)	1,242,434
Identifiable long-lived tangible assets by segment		50,408,449		$ 51,753,964
Identifiable long-lived tangible assets by geographical location		50,408,449		51,753,964
Dyeing and Finishing Equipment [Member]
Segment reporting information revenue [Abstract]
Revenues		4,526,700	6,523,352
Depreciation		955,279	862,084
Interest expense		32,610	35,658
Net income (loss)		368,455	748,216
Identifiable long-lived tangible assets by segment		25,146,775		25,782,801
Forged Rolled Rings and Related Components [Member]
Segment reporting information revenue [Abstract]
Revenues		262,055	7,273,612
Depreciation		662,555	698,441
Interest expense		12,242	8,104
Net income (loss)		(698,078)	613,663
Identifiable long-lived tangible assets by segment		13,775,724		14,212,045
Petroleum and Chemical Equipment [Member]
Segment reporting information revenue [Abstract]
Revenues		130,736	1,849,501
Depreciation		56,894	513,982
Interest expense		10,862	13,581
Net income (loss)		(42,436)	226,429
Identifiable long-lived tangible assets by segment		11,485,950		11,759,118
Other [Member]
Segment reporting information revenue [Abstract]
Net income (loss)	[1]	(472,034)	$ (345,874)
China [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets by geographical location		$ 50,408,449		$ 51,753,964
United States [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets by geographical location

[1] The Company does not allocate any general and administrative expense of its U.S. activities to its reportable segments, because these activities are managed at a corporate level.