Fair value of exercise price per share or per unit of warrants or rights outstanding.

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The remaining contractual life of warrants.

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Represents the number of participants in the Company's non-qualified deferred compensation plan.

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Amount of tax benefit from disqualifying dispositions of stock options granted under share-based compensation arrangement.

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The amount of increase (decrease) to common stock relating to stock option exercises.

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No definition available.

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The number of stock warrants issued during the period.

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Reduction or Increase of income tax expense related to the exercises of stock options in which the employees sold the common shares prior to the passage of 12 months from the date of exercise.

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No definition available.

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Reduction of federal income taxes payable related to the exercises of stock options in which the employees sold the common shares prior to the passage of 12 months from the date of exercise.

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Reduction of income tax expense related to the exercises of stock options in which the employees sold the common shares prior to the passage of 12 months from the date of exercise.

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No definition available.

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Represents the ratio in which available shares are consumed for each full value share awarded by the company as part of a share-based compensation arrangement.

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Aggregate grant date fair value of options vested.

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The estimated forfeiture rate used in the calculation of stock option expense for the period.

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As of the balance sheet date, the number of shares expected to vest.

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Represents the net repurchases of common shares expected to be made in the upcoming fiscal year or, if the information is not presented as of year-end, expected to be made during the remainder of the current fiscal year.

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No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of warrants or rights outstanding.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of additional shares authorized for issuance under an established share-based compensation plan.

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No definition available.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share instruments newly issued under a share-based compensation plan.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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Percentage of vesting of share-based compensation awards.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Note 10 - Equity Compensation (Details Textual)		3 Months Ended		9 Months Ended		12 Months Ended		48 Months Ended
Note 10 - Equity Compensation (Details Textual)	Feb. 21, 2017 shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 shares	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				7 years 146 days	6 years 292 days	6 years 219 days	6 years 36 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant \| shares		1,669,003		1,669,003
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number \| shares		3,631,155	3,043,565	3,631,155	3,043,565	2,976,490	2,677,436
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number \| shares		1,423,528	1,362,810	1,423,528	1,362,810
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 3,508,348		$ 3,508,348
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				2 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares				1,256,623	1,026,800
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares				$ 10.67	$ 9.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 3.71	$ 3.64
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term				5 years 109 days	4 years 109 days
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate		3.30%
Stock or Unit Option Plan Expense		$ 510,851	$ 360,952	$ 1,806,860	$ 2,191,659
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number \| shares		3,148,352		3,148,352
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price \| $ / shares		$ 9.20		$ 9.20
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		$ 4,515,257		$ 4,515,257
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term				7 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value				$ 1,094,696	1,474,444
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Aggregate Grant Date Fair Value				2,260,014	1,149,022
Proceeds from Stock Options Exercised				2,401,000	3,604,000
Employee Service Share-based Compensation, Tax Benefit from Disqualifying Dispositions of Stock Options				138,793	133,172
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options				72,399
Reduction of Federal Income Taxes Payable Related To Stock Option Exercise				465,521	518,515
Increase (Decrease) In Common Stock Related To Stock Option Exercise				138,793	133,172
Reduction of Income Tax Expense Related to Stock Option Exercises				109,140	95,543
Reduction of Deferred Tax Asset Related to Stock Option Exercises				$ 495,175	$ 556,144
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period \| shares				31,782	17,240
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 331,000	$ 168,000
Deferred Compensation Plan, Number of Participants		29		29
Treasury Stock, Shares \| shares		255,119		255,119		228,103
Treasury Stock, Value		$ 2,437,880		$ 2,437,880		$ 2,167,717
Employee Salary Deferrals or Company Contributions [Member]
Treasury Stock, Value, Acquired, Cost Method				$ 446,251	$ 316,900
Treasury Stock, Shares, Acquired \| shares				45,335	32,696
Excluding Tax Effect of Disqualified Dispositions [Member]
Proceeds from Stock Options Exercised				$ 2,612,578	$ 3,737,233
Atlas Lighting Products, Inc. [Member]
Number of Stock Warrants Issued \| shares	200,000	200,000
Class of Warrant or Right, Outstanding \| shares		200,000		200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares		$ 9.95		$ 9.95
Class of Warrant or Right, Exercise Price of Warrants or Rights, Fair value \| $ / shares		$ 2.87		$ 2.87
Class of Warrant or Right, Remaining Contractual Life		4 years 328 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				10 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares				$ 11.06	$ 11.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 3.83	$ 4.52
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term				10 years	9 years 328 days
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate								3.50%
Treasury Stock Acquired, Repurchase Authorization, Shares Expected \| shares		53,000		53,000
Minimum [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares				$ 9.48	$ 8.84
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 3.22	$ 3.28
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term				9 years 109 days	9 years 109 days
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate								2.00%
Treasury Stock Acquired, Repurchase Authorization, Shares Expected \| shares		48,000		48,000
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 752,231		$ 752,231
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				3 years 30 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number \| shares		135,585	65,500	135,585	65,500	62,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 10.84	$ 9.39
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate				3.40%	3.30%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number \| shares		130,316		130,316
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares				96,210	72,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				4 years
Dividends				$ 24,120	$ 7,860
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms				6 years 73 days	9 years 91 days
Allocated Share-based Compensation Expense		$ 93,905	$ 30,387	$ 486,102	$ 350,369
Sharebased Compensation Arrangement By Sharebased Payment Award Equity Other Than Options Expected To Vest Outstanding Number \| shares			63,369		63,369
Annually [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				33.30%
Non-Employee Directors [Member] \| Each Ninety Days [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				25.00%
Employees [Member] \| Annually [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				25.00%
The 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized \| shares				1,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Fungible Share Ratio				2.5