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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash flows from operating activities    
Net income $ 1,867,324 $ 1,338,987
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 2,492,003 1,240,232
Interest from amortization of debt costs 13,704 3,861
Loss on disposal of property and equipment 3,315 0
Stock based compensation 279,397 319,182
Bad debt expense (11,868) (29,551)
Change in fair value of warrant liability 194,632 457,784
Change in fair value of Sellers Note (396,163) 34,476
Deferred rent amortization (58,234) (66,710)
Inventory write-offs to reserves 134,052 47,895
Deferred tax expense (205,884) (40,000)
Changes in operating assets and liabilities:    
Trade accounts receivables 312,026 (1,032,243)
Other receivables (29,018) 142,919
Inventories (1,013,201) (253,179)
Prepaid expenses and other assets (409,137) 171,753
Accounts payable and accrued liabilities (500,237) 595,624
Net cash provided by operating activities 2,672,711 2,931,030
Cash flows from investing activities    
Purchase of property and equipment (2,481,715) (1,412,738)
Acquisiton of ISP Optics, net of cash acquired 0 (11,777,336)
Net cash used in investing activities (2,481,715) (13,190,074)
Cash flows from financing activities    
Proceeds from exercise of stock options 194,150 0
Proceeds from sale of common stock from employee stock purchase plan 48,591 19,632
Loan costs (60,453) (72,224)
Borrowings on loan payable 2,942,583 5,000,000
Proceeds from issuance of common stock under public equity placement 0 8,730,209
Proceeds from exercise of warrants, net of costs 534,318 584,679
Net payments on loan payable (4,351,836) 0
Payments on capital lease obligations (196,790) (141,874)
Net cash (used in) provided by financing activities (889,437) 14,120,422
Effect of exchange rate on cash and cash equivalents (998,410) 62,119
Change in cash and cash equivalents (1,696,851) 3,923,497
Cash and cash equivalents, beginning of period 8,085,015 2,908,024
Cash and cash equivalents, end of period 6,388,164 6,831,521
Supplemental disclosure of cash flow information:    
Interest paid in cash 417,550 91,525
Income taxes paid 562,491 344,820
Supplemental disclosure of non-cash investing & financing activities:    
Purchase of equipment through capital lease arrangements 306,220 230,000
Reclassification of warrant liability upon exercise 685,132 509,771
Derecognition of liability associated with stock option grants 283,399 352,765
Seller note issued to acquire ISP Optics, at fair value 0 6,327,208
Conversion of Sellers Note to common stock $ 2,247,064 $ 0