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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

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- Definition The cash outflow for loan origination associated cost which is usually collected through escrow. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from issuance of shares under share-based compensation arrangement, excluding stock option exercises. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow (outflow) from other long-term debt. + References No definition available. + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References No definition available. + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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