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Consolidated Statements of Cash Flows - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:    
Net loss $ (7,580,240) $ (7,691,771)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation expense 47,495 66,604
Amortization of patents 53,013 814,681
Impairment to long lived assets 1,539,794
Stock compensation 183,888 409,021
Loss from earnings on China joint venture (81,324) (329,700)
Inventory reserve 543,545
Deferred cost reserve 1,250,928
Change in fair value of derivative liability 3,635,580
Amortization of right-of-use assets 155,962
Changes in operating assets and liabilities:    
Decrease (Increase) in accounts receivable 267,791 (442,943)
Decrease (Increase) in accounts receivable, related party 100,000 (192,540)
(Increase) in other receivables (9,027)
Decrease in inventories 300,542 914,613
(Increase) Decrease in advances on contracts (61,879) 48,409
(Increase) Decrease in prepaid expenses and other current assets (104,522) 21,869
Increase in accounts payable 320,239 227,773
(Decrease) Increase in accounts payable, related party (303,346) 678,171
Decrease (Increase) in deferred cost, related party 50,000 (191,257)
Increase in accrued expenses 273,537 620,797
Increase (Decrease) in accrued expenses, related party 1,228,965 (108,640)
Decrease in operating lease liability (155,962)
(Decrease) Increase in deferred revenue, related party (100,000) 192,540
Net cash used in operating activities (1,779,288) (1,628,106)
Cash flows from investing activities:    
Purchase of intangible assets
Purchase of property and equipment (9,916) (7,401)
Acquisition of Milestone Education (8,020)
Net cash used in investing activities (9,916) (15,421)
Cash flows from financing activities:    
Payments for financing transaction (250,000)
Proceeds from exercise of warrants 337,500
Net proceeds from Public Placement Offering 1,974,547
Net proceeds from Private Placement Offering 250,000
Net cash provided by financing activities 2,562,047 (250,000)
Net increase (decrease) in cash and cash equivalents 772,843 (1,893,527)
Cash and cash equivalents at beginning of period 743,429 2,636,956
Cash and cash equivalents at end of period 1,516,272 743,429
Supplemental non-cash disclosure of cash flow information:    
Shares issued to employee for bonuses 753,000
Shares issued to board of directors for services rendered 67,000
Shares issued to employees for compensation 37,500 45,000
Shares issued to consultants in lieu of cash payments 440,400 289,750
Sale of Milestone China share, financing transaction (1,400,000)
Credit from United Systems for defective handpieces (151,562)
Initial recognition of operating lease-right of use assets (166,292)
Initial recognition of operating lease right to used liabilities $ 166,292