Segment Information (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment reporting information revenue [Abstract]
Revenue		$ 12,025,433	$ 20,246,555	$ 42,862,498	$ 55,409,844
Depreciation		2,022,385	2,160,933	6,166,899	6,245,723
Interest expense		61,131	60,487	175,102	178,313
Net income (loss)		904,131	2,699,741	3,373,135	7,314,003
Identifiable long-lived tangible assets by segment		61,710,247		61,710,247		$ 70,051,137
Identifiable long-lived tangible assets by geographical location		61,710,247		61,710,247		70,051,137
Forged Rolled Rings and Related Components [Member]
Segment reporting information revenue [Abstract]
Revenue		1,420,348	8,447,067	11,692,962	24,554,012
Depreciation		684,422	1,208,415	2,086,489	3,632,810
Interest expense		12,735	22,910	27,740	68,113
Net income (loss)		(302,083)	1,156,394	286,505	3,430,514
Identifiable long-lived tangible assets by segment	[1]	19,817,335		19,817,335		38,937,371
Dyeing and Finishing Equipment [Member]
Segment reporting information revenue [Abstract]
Revenue		8,355,273	11,799,488	23,491,579	30,855,832
Depreciation		850,480	784,858	2,572,477	2,277,266
Interest expense		35,561	37,577	107,474	110,200
Net income (loss)		1,170,705	$ 1,702,327	3,080,537	$ 4,375,925
Identifiable long-lived tangible assets by segment		27,168,582		27,168,582		$ 30,691,226
Petroleum and Chemical Equipment [Member]
Segment reporting information revenue [Abstract]
Revenue		2,249,812		7,677,957
Depreciation		487,483		1,507,933
Interest expense		12,835		39,888
Net income (loss)		114,609		500,473
Identifiable long-lived tangible assets by segment	[1]	14,316,108		14,316,108
Equipment Held For Sale [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets by segment		$ 408,222		$ 408,222		$ 422,540
Other [Member]
Segment reporting information revenue [Abstract]
Depreciation	[2]		$ 167,660		$ 335,647
Net income (loss)	[3]	$ (79,100)	$ (158,980)	$ (494,380)	$ (492,436)
China [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets by geographical location		$ 61,710,247		$ 61,710,247		$ 70,051,137
United States [Member]
Segment reporting information revenue [Abstract]
Identifiable long-lived tangible assets by geographical location

[1] Reflects reclassification of property and equipment previously used in the forged rolled rings and related components segment to petroleum and chemical equipment segment.

[2] Depreciation for equipment held for sale is not taken in the three and nine months ended September 30, 2015. The Company does not allocate the depreciation for equipment held for sale to any operating segment. In the three and nine months ended September 30, 2014, such depreciation is reflected as a reduction in rental income.

[3] 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.