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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash flows from operating activities:    
Net (loss) income $ (1,384,997) $ 12,188
Net loss attributable to noncontrolling interest (369,047) (205,108)
Net income (loss) attributable to common stockholders (1,015,950) 217,296
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:    
Net loss attributable to noncontrolling interest (369,047) (205,108)
Deferred provision for income taxes (649,288)  
Disposal loss on property and equipment 60,642  
Provision for bad debt 90,793 (453)
Warranty reserves 2,496 17,555
Amortization of deferred gain (111,859) (28,838)
Depreciation and amortization 842,034 600,844
Inventory reserves 283,634 (1,064,285)
Amortization of debt discount 24,830 17,878
Stock-based compensation expense 374,979 104,250
Changes in operating assets and liabilities:    
Accounts receivable (2,487,103) 950,690
Inventories (247,131) (447,331)
Prepaid expenses and other current assets (308,439) (288,885)
Accounts payable (1,534,530) (423,257)
Accrued expenses and other liabilities (91,026) 846,444
Net cash (used in) provided by operating activities (5,134,965) 296,800
Cash flows from investing activities:    
Cash acquired in merger 139,634  
Proceeds from sales of property and equipment 34,450  
Cash paid in acquistion of CDI (646,759)  
Purchases of property and equipment, including capitalization of labor costs for tooling and test equipment (80,474) (117,523)
Net cash used in investing activities (553,149) (117,523)
Cash flows from financing activities:    
Proceeds from stock options exercised 64,454 99,594
Contribution related to non-controlling interest   750,000
Payment on working capital loan (370,096)  
Payment of payroll taxes on net issuance of employee stock options (340,148)  
Stock issuance costs (1,810,902)  
Proceeds from issuance of common stock 19,500,000  
Net repayments on bank line of credit (3,334,508) 6,142
Payments on related-party notes payable (163,483) (99,646)
Payments on notes payable (985,692) (460,980)
Net cash provided by financing activities 12,559,625 295,110
Net change in cash and cash equivalents 6,871,511 474,387
Cash and cash equivalents, beginning of period 185,717 14,197
Cash and cash equivalents, end of period 7,057,228 488,584
Supplemental disclosure of cash flow information:    
Cash paid during the period for interest 39,511 123,120
Cash paid during the period for income taxes 2,500  
Supplemental disclosure of non-cash transactions:    
Acquisition of CDI through issuance of common stock (Note 3) 4,194,673  
Fair value of warrants issued in connection with initial public offering 669,408  
Reclassification of prepaid IPO expenses to additional paid in capital 887,450  
Disposal of obsolete inventory 947,400 867,538
Change in labor and overhead applied to inventory $ 957,694 $ (149,014)

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