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Consolidated Statements of Cash Flows (unaudited) - USD ($)
 3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities    
Net income $ 140,496 $ 842,973
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 249,465 181,202
Stock based compensation 119,940 73,410
Provision for doubtful accounts receivable   (289)
Change in fair value of warrant liability (43,500) (368,114)
Deferred rent (32,346) 35,051
Changes in operating assets and liabilities:    
Trade accounts receivables 232,466 154,304
Other receivables 88,073 92,769
Inventories (227,968) (164,332)
Prepaid expenses and other assets 34,140 29,159
Accounts payable and accrued liabilities 361,127 21,277
Net cash provided by operating activities 921,893 897,410
Cash flows from investing activities    
Purchase of property and equipment (387,259) (285,236)
Net cash used in investing activities (387,259) (285,236)
Cash flows from financing activities    
Proceeds from sale of common stock from employee stock purchase plan 9,598 8,228
Proceeds from exercise of warrants, net of costs 70,957  
Net payments on loan payable   (48,353)
Payments on capital lease obligations (35,300) (29,464)
Net cash provided by (used in) financing activities 45,255 (69,589)
Effect of exchange rate on cash and cash equivalents 95,859 163,520
Change in cash and cash equivalents 675,748 706,105
Cash and cash equivalents, beginning of period 2,908,024 1,643,920
Cash and cash equivalents, end of period 3,583,772 2,350,025
Supplemental disclosure of cash flow information:    
Interest paid in cash 6,942 12,870
Income taxes paid $ 116,043 $ 2,056