Segment Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Segment reporting information revenue [Abstract]
Revenues	$ 75,958,676		$ 72,112,662
Depreciation	8,469,771		6,704,386
Interest expense	238,226		300,381
Net income (loss)	4,266,417		8,185,577
Identifiable long-lived tangible assets	70,051,137		75,346,344
Identifiable long-lived tangible assets	70,051,137		75,346,344
Forged Rolled Rings and Related Components [Member]
Segment reporting information revenue [Abstract]
Revenues	33,749,334		33,775,849
Depreciation	4,846,273		4,355,417
Interest expense	90,701		141,324
Net income (loss)	(482,221)		3,244,455
Identifiable long-lived tangible assets	38,937,371		43,987,670
Dyeing and Finishing Equipment [Member]
Segment reporting information revenue [Abstract]
Revenues	42,209,342		38,336,813
Depreciation	3,119,823		2,348,969
Interest expense	147,525		159,057
Net income (loss)	5,494,791		5,747,096
Identifiable long-lived tangible assets	30,691,226		26,607,468
Other [Member]
Segment reporting information revenue [Abstract]
Depreciation	503,675	[1]		[1]
Net income (loss)	(746,153)	[2]	(805,974)	[2]
Equipment Held For Operating Lease [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets	422,540		4,751,206
China [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets	70,051,137		75,346,344
United States [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets

[1] The Company does not allocate the depreciation for equipment held for sale/operating lease to any operating segment.

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