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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash Flows From Operating Activities    
Net income $ 354,635 $ 346,208
Adjustments to reconcile net income from operations to net cash used in operating activities:    
Depreciation and amortization 74,324 89,752
Loss on sale of equipment 40,045
Bad debt expense 30,000
Changes in operating assets and liabilities:    
Trade receivables, net (105,606) (209,217)
Trade receivables, related party, net (39,215)
Inventories (550,567) (3,190)
Prepaid expenses (185,536) (188,287)
Intangible assets (15,000)
Note receivable 8,317
Other assets (451) 39,038
Accounts payable - trade and accrued expenses (564,868) (308,133)
Accounts payable - trade, related party (13,853) (212,616)
Operating leases 59,848
Customer deposits and other liabilities (43,132) 155,458
Net cash used in operating activities (960,206) (281,840)
Cash Flows From Investing Activities:    
Purchase of property and equipment (14,175) (86,074)
Net cash used in investing activities (14,175) (86,074)
Cash Flows From Financing Activities:    
Payments on capital lease obligations (1,181)
Net cash used in financing activities (1,181)
Net change in cash and cash equivalents (974,381) (369,095)
Cash and cash equivalents, beginning of period 1,453,941 1,272,208
Cash and cash equivalents, end of period 479,560 903,113
Cash paid during the period for:    
Interest 34,549 46,882
Income taxes