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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:    
Net loss $ (1,320,438) $ (4,450,152)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,032,986 1,124,063
Amortization of debt issuance costs 95,429 95,507
Cash expended in excess of rent expense (137,737) (112,048)
Stock-based compensation expense 711,344 730,564
Common stock issued as employee compensation 32,324
Bad debt expense (23,395) 34,098
Changes in operating assets and liabilities:    
Decrease in accounts receivable 2,090,091 1,807,802
(Increase) decrease in contract assets (4,448,831) 2,308,059
(Increase) decrease in inventory (3,676,535) 227,336
Decrease in prepaid expenses and other current assets 187,107 1,202,189
Decrease in refundable income taxes 434,904 394,902
Increase (decrease) in accounts payable and accrued expenses 7,214,124 (678,380)
(Decrease) in contract liabilities (1,911,158) (1,968,872)
(Decrease) in loss reserve (1,849,992) (1,012,597)
(Decrease) in income taxes payable (354) (112,777)
Net cash used in operating activities (1,602,455) (377,982)
Cash flows from investing activities:    
Purchase of property and equipment (146,788) (436,010)
Net cash used in investing activities (146,788) (436,010)
Cash flows from financing activities:    
Payment of line of credit (1,300,000)
Proceeds from line of credit 4,000,000
Proceeds from PPP loan 4,795,000
Payment of long-term debt (2,337,473) (2,436,786)
Stock offering costs paid (119,571)
Debt issuance costs (107,540) (25,000)
Net cash provided by financing activities 2,349,987 118,643
Net (decrease) increase in cash and restricted cash 600,744 (695,349)
Cash and restricted cash at beginning of year 5,432,793 6,128,142
Cash and restricted cash at end of year 6,033,537 5,432,793
Supplemental schedule of noncash investing, financing activities:    
Equipment acquired under capital lease 134,900 399,800
Supplemental schedule of cash flow information:    
Cash paid during the year for interest 1,490,152 2,066,174
Cash paid (received) for income taxes $ (488,052) $ (378,652)