Note 12 - Business Combinations - Summary of Brigadier Security Systems Acquisition (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2016	Jun. 02, 2016
Goodwill	$ 498,973	$ 498,973
Brigadier Security Systems Acquisition [Member]
Cash			$ 80,391
Accounts receivable			431,656
Inventory			238,148
Prepaid expenses			20,001
Property and equipment			20,455
Intangible assets			875,087
Goodwill			353,507
Total assets			2,019,246
Accounts payable			187,925
Income tax payable			55,953
Deferred tax liability			231,898
Customer deposits			2,640
Total liabilities			478,416
Consideration paid for net assets			$ 1,540,830

Amount of liabilities incurred for customer deposits, assumed at the acquisition date.

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Amount of assets acquired at the acquisition date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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