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Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Cash flows from operating activities: |  |  |
Net income (loss) | $ 5,015,993 | $ (25,209,275) | $ 7,736,894
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |  |
Depreciation, Depletion and Amortization | 854,063 | 763,736 | 704,435
Deferred rent | 46,017 | 17,098 | 54,621
Stock-based compensation expense | 524,274 | 467,765 | 379,809
Common stock issued as employee compensation | $ 59,423 | 57,993 | $ 41,830
Loss on disposal of fixed asset |  | 1,042 |
Deferred portion of provision for income taxes | $ 2,659,000 | (3,790,000) | $ (107,000)
Tax benefit for stock options | (33,000) | $ (86,000) | $ (27,000)
Bad debt expense | 50,000 |  |
Changes in operating assets and liabilities: |  |  |
(Increase) decrease in accounts receivable | $ (1,249,023) | $ (2,074,560) | $ 2,382,092
Decrease in other assets |  |  | 1,512,904
(Increase) decrease in costs and estimated earnings in excess of billings on uncompleted contracts | $ (23,568,248) | $ 33,542,997 | (3,612,292)
Decrease in prepaid expenses and other current assets | (237,199) | (219,007) | $ (183,205)
Increase in refundable income taxes | 8,133,433 | (8,138,322) |
Increase (decrease) in accounts payable and accrued expenses | 9,446,948 | 1,715,580 | $ (5,817,028)
Increase in accrued losses on uncompleted contracts | 153,541 | 396,182 |
(Decrease) increase in income taxes payable | 220,822 | (730,469) | $ 582,536
Increase (decrease) in billings in excess of costs and estimated earnings on uncompleted contracts | (18,212) | (82,520) | (380,683)
Net cash (used in) provided by operating activities | 2,057,832 | (3,367,760) | 3,267,913
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (209,718) | (602,924) | (637,370)
Net cash used in investing activities | (209,718) | (602,924) | $ (637,370)
Cash flows from financing activities: |  |  |
Proceeds from exercise of stock options | 80,000 | 447,751 |
Payment of line of credit | (9,650,000) | (4,700,000) | $ (13,100,000)
Proceeds from line of credit | 8,200,000 | 8,500,000 | 11,000,000
Payment of long-term debt | (1,013,998) | (1,024,263) | (1,101,243)
Tax benefit for stock options | 33,000 | 86,000 | 27,000
Net cash provided by (used in) financing activities | (2,350,998) | 3,309,488 | (3,174,243)
Net decrease in cash | (502,884) | (661,196) | (543,700)
Cash at beginning of year | 1,504,907 | 2,166,103 | 2,709,803
Cash at end of year | 1,002,023 | $ 1,504,907 | $ 2,166,103
Supplemental schedule of noncash investing and financing activities: |  |  |
Equipment acquired under capital lease | $ 247,881 |  |
Accrued expenses settled in exchange for common stock |  |  | $ 152,076
Stock options proceeds paid with Company’s stock |  |  | 303,064
Supplemental schedule of cash flow information: |  |  |
Cash paid during the year for interest | $ 1,000,403 | $ 915,695 | 985,189
Cash paid for income taxes | $ 351,275 | $ 855,000 | $ 3,000,000

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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 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=56944662&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 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- References No definition available. + Details
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