Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 11,770,854	$ 13,721,324
Accounts receivable, net	4,022,075	4,515,124
Cost and estimated earnings in excess of billings on uncompleted contracts	2,998,875	2,730,104
Inventories	2,904,900	2,742,905
Deferred income taxes – current	592,503	189,153
Other current assets	127,977	192,438
Total Current Assets	22,417,184	24,091,048
Property, plant and equipment, net	12,795,463	12,894,154
Construction in progress	4,991,257	4,051,573
Deferred income taxes – non-current	627,774	568,744
Restricted cash	800,000	800,000
Other assets	76,505	78,128
Intangible assets, net	39,525	41,614
Total Assets	41,747,708	42,525,261
Current Liabilities:
Current maturities of long-term debt	937,866	935,822
Billings in excess of costs and estimated earnings on uncompleted contracts	262,515	475,905
Accounts payable and accrued expenses	2,154,659	2,243,447
Deferred revenue	457,517	335,404
Total Current Liabilities	3,812,557	3,990,578
Long-term debt, net of current portion	7,152,159	7,387,019
Total Liabilities	10,964,716	11,377,597
Commitments and Contingencies
Stockholders’ Equity
Common stock - $0.01 par value – 10,000,000 shares authorized; issued and outstanding, 6,057,770 at March 31, 2013 and 6,046,970 at December 31, 2012	60,578	60,470
Additional paid-in-capital	21,066,117	20,990,891
Retained earnings	9,656,297	10,096,303
Total Stockholders’ Equity	30,782,992	31,147,664
Total Liabilities and Stockholders’ Equity	$ 41,747,708	$ 42,525,261