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Consolidated Statements of Cash Flows (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities: |  |  |  |
Net income | $ 435,586 |  | $ 3,779,123 |
Adjustments to reconcile net income to net cash (used in) provided by operating activities |  |  |  |
Stock-based compensation | 234,858 |  | 290,598 |
Loss on sale of building | 693,818 |  |  |
Gain on sale of other fixed assets | (3,288) |  |  |
Depreciation and amortization | 515,215 | [1] | 597,040 | [1]
Deferred income tax expense | (178,307) |  | 433,179 |
Bad debt provision | 6,537 |  | 6,449 |
(Increase)/decrease in operating assets |  |  |  |
Accounts receivable | (858,082) |  | (760,855) |
Cost in excess of billings on uncompleted contracts | 680,720 |  | (1,752,135) |
Inventories, net | 464,168 |  | 760,390 |
Other current assets | (41,635) |  | (14,534) |
(Decrease)/increase in operating liabilities |  |  |  |
Billings in excess of costs and estimated earnings on uncompleted contracts | (1,211,305) |  | (636,481) |
Accounts payable | 106,004 |  | 495,404 |
Accrued expenses | (271,888) |  |  |
Deferred revenue | (754,562) |  | 989,593 |
Total adjustments | (617,747) |  | 408,648 |
Net cash (used in) provided by operating activities | (182,161) |  | 4,187,771 |
Cash flows from investing activities: |  |  |  |
Restricted cash | 200,000 |  | (1,000,000) |
Capital expenditures | (11,796,740) |  | (204,935) |
Deposits | 322,281 |  | (360,000) |
Net cash (used in) investing activities | (9,670,636) |  | (1,564,935) |
Cash flows from financing activities |  |  |  |
Net proceeds from issuance of common stock (Note 11) |  |  | 9,387,666 |
Net proceeds from stock options exercised | 286,547 |  | 473,973 |
Proceeds from long-term debt | 6,000,000 |  | 2,100,000 |
Payments of long-term debt | (848,953) |  | (2,697,038) |
Net cash provided by financing activities | 5,437,594 |  | 9,264,601 |
Net (decrease)/increase in cash and cash equivalents | (4,415,203) |  | 11,887,437 |
Cash and cash equivalents at beginning of year | 18,136,527 |  | 6,249,090 |
Cash and cash equivalents at end of year | 13,721,324 |  | 18,136,527 |
Supplemental disclosure of cash flow information: |  |  |  |
Income taxes paid | 451,525 |  | 813,336 |
Interest paid | 204,874 |  | 182,969 |
Building [Member] |  |  |  |
Cash flows from investing activities: |  |  |  |
Proceeds from sale of property, plant and equipment | 1,582,323 |  |  |
Other Fixed Assets [Member] |  |  |  |
Cash flows from investing activities: |  |  |  |
Proceeds from sale of property, plant and equipment | $ 21,500 |  |  |
[1] | Includes amortization expense of $14,096 and $136,704 for the years ending December 31, 2012 and 2011, respectively. Such amortization expense relates to other capitalized and intangible assets.

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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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