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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities    
Net income $ 1,060,104 $ 7,703,086
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 3,403,581 2,080,439
Interest from amortization of debt costs 19,685 7,721
(Gain) loss on disposal of property and equipment (258) 1,444
Stock based compensation 373,554 394,875
Bad debt expense (16,417) (29,551)
Change in fair value of warrant liability 194,632 467,543
Change in fair value of Sellers Note (396,163) 68,955
Deferred rent amortization (81,475) (89,363)
Inventory write-offs to reserves 187,547 90,268
Deferred tax expense (533,806) (5,493,704)
Changes in operating assets and liabilities:    
Trade accounts receivables 618,393 (1,042,426)
Other receivables (15,997) 160,070
Inventories (1,330,994) (318,645)
Prepaid expenses and other assets (685,260) 151,821
Accounts payable and accrued liabilities (178,138) 846,511
Net cash provided by operating activities 2,618,988 4,999,044
Cash flows from investing activities    
Purchase of property and equipment (2,517,685) (2,223,126)
Acquisiton of ISP Optics, net of cash acquired 0 (11,777,336)
Net cash used in investing activities (2,517,685) (14,000,462)
Cash flows from financing activities    
Proceeds from exercise of stock options 226,001 0
Proceeds from sale of common stock from employee stock purchase plan 48,591 19,632
Loan costs (61,253) (72,224)
Borrowings on loan payable 2,942,583 5,000,000
Proceeds from issuance of common stock under public equity placement 0 8,749,496
Proceeds from exercise of warrants, net of costs 534,318 705,679
Payments on loan payable (4,716,536) 0
Payments on capital lease obligations (287,354) (193,940)
Net cash (used in) provided by financing activities (1,313,650) 14,208,643
Effect of exchange rate on cash and cash equivalents (364,048) (30,234)
Change in cash and cash equivalents (1,576,395) 5,176,991
Cash and cash equivalents, beginning of period 8,085,015 2,908,024
Cash and cash equivalents, end of period 5,508,620 8,085,015
Supplemental disclosure of cash flow information:    
Interest paid in cash 546,306 334,589
Income taxes paid 386,471 680,055
Supplemental disclosure of non-cash investing & financing activities:    
Purchase of equipment through capital lease arrangements 763,247 230,000
Reclassification of warrant liability upon exercise 685,132 694,436
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