Summary of Significant Financial Information Relating to Product Groups (Detail) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 31,981,813	$ 28,274,696	$ 26,310,369	$ 29,582,144	$ 31,960,024	$ 31,719,922	$ 33,334,070	$ 39,434,770	$ 116,149,022	$ 136,448,786
Operating profit (loss)									2,474,696	9,086,513
Interest and other income									62,012	58,764
TOTAL EARNINGS BEFORE INCOME TAXES									2,536,708	9,145,277
Total assets	72,284,399				76,575,129				72,284,399	76,575,129
Depreciation									1,823,072	1,790,041
Capital Expenditure									1,907,231	499,486
Operating Segments
Segment Reporting Information [Line Items]
Operating profit (loss)									4,448,930	11,544,935
Total assets	56,103,157				59,613,943				56,103,157	59,613,943
Operating Segments | Coil
Segment Reporting Information [Line Items]
Net sales									66,138,845	67,045,885
Operating profit (loss)									(839,442)	848,252
Total assets	22,308,165				29,779,697				22,308,165	29,779,697
Depreciation									1,140,250	1,113,053
Capital Expenditure									364,443	333,916
Operating Segments | Tubular
Segment Reporting Information [Line Items]
Net sales									50,010,177	69,402,901
Operating profit (loss)									5,288,372	10,696,683
Total assets	33,794,992				29,834,246				33,794,992	29,834,246
Depreciation									673,850	669,876
Capital Expenditure									1,533,489	165,570
Corporate and other
Segment Reporting Information [Line Items]
General corporate expenses									(1,974,234)	(2,458,422)
Total assets	16,181,242				16,961,186				16,181,242	16,961,186
Depreciation									8,972	7,112
Capital Expenditure									$ 9,299