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UPDATES TO CRITICAL ACCOUNTING POLICIES AND ESTIMATES UPDATES TO CRITICAL ACCOUNTING POLICIES AND ESTIMATES (Tables) | 12 Months Ended
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May. 30, 2015
Accounting Policies and Estimates [Abstract] |
Property, Plant and Equipment [Table Text Block] | Property, plant and equipment consist of the following (in thousands):
| May 30, 2015 |  | May 31, 2014
Land and improvements | $ | 1,594 |  |  | $ | 1,598 |
Buildings and improvements | 18,883 |  |  | 18,456 |
Computer and communications equipment | 6,774 |  |  | 3,792 |
Construction in progress | 1,218 |  |  | 1,377 |
Machinery and other equipment | 6,562 |  |  | 5,795 |
| $ | 35,031 |  |  | $ | 31,018 |
Accumulated depreciation | (24,950 | ) |  | (23,795 | )
Property, plant, and equipment, net | $ | 10,081 |  |  | $ | 7,223 |
Property Plant And Equipment Estimated Useful Lives Table [Text Block] | Supplemental disclosure information of the estimated useful life of the asset:
Land improvements | 10 years
Buildings and improvements | 10 - 30 years
Computer and communications equipment | 3 - 10 years
Machinery and other equipment | 3 - 10 years
Schedule of Accrued Liabilities [Table Text Block] | Accrued liabilities consist of the following (in thousands):
| May 30, 2015 |  | May 31, 2014
Compensation and payroll taxes | $ | 4,303 |  |  | $ | 4,692 |
Income taxes | 572 |  |  | 68 |
Professional fees | 885 |  |  | 560 |
Other accrued expenses | 4,384 |  |  | 3,900 |
Accrued Liabilities | $ | 10,144 |  |  | $ | 9,220 |
Schedule of Product Warranty Liability [Table Text Block] | Changes in the warranty reserve during fiscal 2015 and 2014 were as follows (in thousands):
| Warranty Reserve
Balance at June 1, 2013 | $ | 188 |
Accruals for products sold | 202 |
Utilization | (215 | )
Balance at May 31, 2014 | $ | 175 |
Accruals for products sold | 116 |
Utilization | (103 | )
Balance at May 30, 2015 | $ | 188 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of stock option activity is as follows (in thousands, except option prices and years):
| Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value
Options Outstanding at June 2, 2012 | 766 |  |  | $ | 9.52 |  |  |  |  |
Granted | 225 |  |  | 11.70 |  |  |  |  |
Exercised | (31 | ) |  | 6.37 |  |  |  |  |
Forfeited | (14 | ) |  | 10.40 |  |  |  |  |
Cancelled | (2 | ) |  | 12.43 |  |  |  |  |
Options Outstanding at June 1, 2013 | 944 |  |  | $ | 10.13 |  |  |  |  |
Granted | 224 |  |  | 11.15 |  |  |  |  |
Exercised | (32 | ) |  | 5.84 |  |  |  |  |
Forfeited | (54 | ) |  | 11.73 |  |  |  |  |
Cancelled | (17 | ) |  | 11.52 |  |  |  |  |
Options Outstanding at May 31, 2014 | 1,065 |  |  | $ | 10.37 |  |  |  |  |
Granted | 225 |  |  | 9.92 |  |  |  |  |
Exercised | (47 | ) |  | 6.53 |  |  |  |  |
Forfeited | (34 | ) |  | 11.42 |  |  |  |  |
Cancelled | (72 | ) |  | 11.19 |  |  |  |  |
Options Outstanding at May 30, 2015 | 1,137 |  |  | $ | 10.35 |  |  | 6.5 |  | $ | 594 |
Options Vested at May 30, 2015 | 608 |  |  | $ | 9.83 |  |  | 4.9 |  | $ | 594 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair value of stock options is estimated using the Black-Scholes option-pricing model with the following weighted average assumptions:
| Fiscal Year Ended
| May 30, 2015 |  | May 31, 2014 |  | June 1, 2013
Expected volatility | 46.12 | % |  | 49.31 | % |  | 50.79 | %
Risk-free interest rate | 2.12 | % |  | 2.03 | % |  | 1.12 | %
Expected lives (years) | 6.47 |  |  | 6.47 |  |  | 6.37 |
Annual cash dividend | $ | 0.24 |  |  | $ | 0.24 |  |  | $ | 0.24 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] | The following table summarizes information about stock options outstanding at May 30, 2015 (in thousands, except option prices and years):
| Outstanding |  | Vested
Exercise Price Range | Shares |  | Price |  | Life |  | Aggregate Intrinsic Value |  | Shares |  | Price |  | Life |  | Aggregate Intrinsic Value
$4.26 to $7.24 | 185 |  |  | $ | 5.70 |  |  | 3.8 |  | $ | 547 |  |  | 185 |  |  | $ | 5.75 |  |  | 3.8 |  | $ | 547 |
$7.32 to $11.14 | 507 |  |  | $ | 10.16 |  |  | 7.7 |  | $ | 47 |  |  | 131 |  |  | $ | 8.96 |  |  | 4.4 |  | $ | 47 |
$11.50 to $13.76 | 445 |  |  | $ | 12.51 |  |  | 6.3 |  | $ | — |  |  | 292 |  |  | $ | 12.66 |  |  | 6.0 |  | $ | — |
Total | 1,137 |  |  | $ | 10.35 |  |  | 6.5 |  | $ | 594 |  |  | 608 |  |  | $ | 9.83 |  |  | 4.9 |  | $ | 594 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The per share amounts presented in the consolidated statements of comprehensive income (loss) are based on the following (amounts in thousands, except per share amounts):
| For the Fiscal Year Ended
| May 30, 2015 |  | May 31, 2014 |  | June 1, 2013
| Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted
Numerator for Basic and Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations | $ | (5,528 | ) |  | $ | (5,528 | ) |  | $ | (345 | ) |  | $ | (345 | ) |  | $ | 482 |  |  | $ | 482 |
Less dividends: |  |  |  |  |  |  |  |  |  |  |
Common stock | 2,794 |  |  | 2,794 |  |  | 2,853 |  |  | 2,853 |  |  | 2,971 |  |  | 2,971 |
Class B common stock | 466 |  |  | 466 |  |  | 488 |  |  | 488 |  |  | 600 |  |  | 600 |
Undistributed earnings (losses) | $ | (8,788 | ) |  | $ | (8,788 | ) |  | $ | (3,686 | ) |  | $ | (3,686 | ) |  | $ | (3,089 | ) |  | $ | (3,089 | )
Common stock undistributed earnings (losses) | $ | (7,539 | ) |  | $ | (7,539 | ) |  | $ | (3,151 | ) |  | $ | (3,151 | ) |  | $ | (2,570 | ) |  | $ | (2,575 | )
Class B common stock undistributed earnings (losses) | (1,249 | ) |  | (1,249 | ) |  | (535 | ) |  | (535 | ) |  | (519 | ) |  | (514 | )
Total undistributed earnings (losses) | $ | (8,788 | ) |  | $ | (8,788 | ) |  | $ | (3,686 | ) |  | $ | (3,686 | ) |  | $ | (3,089 | ) |  | $ | (3,089 | )
Income (loss) from discontinued operations | $ | (31 | ) |  | $ | (31 | ) |  | $ | (170 | ) |  | $ | (170 | ) |  | $ | 766 |  |  | $ | 766 |
Less dividends: |  |  |  |  |  |  |  |  |  |  |
Common stock | 2,794 |  |  | 2,794 |  |  | 2,853 |  |  | 2,853 |  |  | 2,971 |  |  | 2,971 |
Class B common stock | 466 |  |  | 466 |  |  | 488 |  |  | 488 |  |  | 600 |  |  | 600 |
Undistributed earnings (losses) | $ | (3,291 | ) |  | $ | (3,291 | ) |  | $ | (3,511 | ) |  | $ | (3,511 | ) |  | $ | (2,805 | ) |  | $ | (2,805 | )
Common stock undistributed earnings (losses) | $ | (2,823 | ) |  | $ | (2,823 | ) |  | $ | (3,001 | ) |  | $ | (3,001 | ) |  | $ | (2,334 | ) |  | $ | (2,338 | )
Class B common stock undistributed earnings (losses) | (468 | ) |  | (468 | ) |  | (510 | ) |  | (510 | ) |  | (471 | ) |  | (467 | )
Total undistributed earnings (losses) | $ | (3,291 | ) |  | $ | (3,291 | ) |  | $ | (3,511 | ) |  | $ | (3,511 | ) |  | $ | (2,805 | ) |  | $ | (2,805 | )
Net income (loss) | $ | (5,559 | ) |  | $ | (5,559 | ) |  | $ | (515 | ) |  | $ | (515 | ) |  | $ | 1,248 |  |  | $ | 1,248 |
Less dividends: |  |  |  |  |  |  |  |  |  |  |
Common stock | 2,794 |  |  | 2,794 |  |  | 2,853 |  |  | 2,853 |  |  | 2,971 |  |  | 2,971 |
Class B common stock | 466 |  |  | 466 |  |  | 488 |  |  | 488 |  |  | 600 |  |  | 600 |
Undistributed earnings (losses) | $ | (8,819 | ) |  | $ | (8,819 | ) |  | $ | (3,856 | ) |  | $ | (3,856 | ) |  | $ | (2,323 | ) |  | $ | (2,323 | )
Common stock undistributed earnings (losses) | $ | (7,565 | ) |  | $ | (7,565 | ) |  | $ | (3,296 | ) |  | $ | (3,296 | ) |  | $ | (1,933 | ) |  | $ | (1,937 | )
Class B common stock undistributed earnings (losses) | (1,254 | ) |  | (1,254 | ) |  | (560 | ) |  | (560 | ) |  | (390 | ) |  | (386 | )
Total undistributed earnings (losses) | $ | (8,819 | ) |  | $ | (8,819 | ) |  | $ | (3,856 | ) |  | $ | (3,856 | ) |  | $ | (2,323 | ) |  | $ | (2,323 | )
Denominator for basic and diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Common stock weighted average shares | 11,682 |  |  | 11,682 |  |  | 11,915 |  |  | 11,915 |  |  | 12,448 |  |  | 12,448 |
Class B common stock weighted average shares, and shares under if-converted method for diluted EPS | 2,151 |  |  | 2,151 |  |  | 2,250 |  |  | 2,250 |  |  | 2,790 |  |  | 2,790 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |
Dilutive stock options |  |  | — |  |  |  |  | — |  |  |  |  | 134 |
Denominator for diluted EPS adjusted for weighted average shares and assumed conversions |  |  | 13,833 |  |  |  |  | 14,165 |  |  |  |  | 15,372 |
Income (loss) from continuing operations per share: |  |  |  |  |  |  |  |  |  |  |
Common stock | $ | (0.41 | ) |  | $ | (0.41 | ) |  | $ | (0.03 | ) |  | $ | (0.03 | ) |  | $ | 0.03 |  |  | $ | 0.03 |
Class B common stock | $ | (0.36 | ) |  | $ | (0.36 | ) |  | $ | (0.02 | ) |  | $ | (0.02 | ) |  | $ | 0.03 |  |  | $ | 0.03 |
Income (loss) from discontinued operations per share: |  |  |  |  |  |  |  |  |  |  |
Common stock | $ | — |  |  | $ | — |  |  | $ | (0.01 | ) |  | $ | (0.01 | ) |  | $ | 0.05 |  |  | $ | 0.05 |
Class B common stock | $ | — |  |  | $ | — |  |  | $ | (0.01 | ) |  | $ | (0.01 | ) |  | $ | 0.05 |  |  | $ | 0.05 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Common stock | $ | (0.41 | ) |  | $ | (0.41 | ) |  | $ | (0.04 | ) |  | $ | (0.04 | ) |  | $ | 0.08 |  |  | $ | 0.08 |
Class B common stock | $ | (0.36 | ) |  | $ | (0.36 | ) |  | $ | (0.03 | ) |  | $ | (0.03 | ) |  | $ | 0.08 |  |  | $ | 0.08 |
Note: Common stock options that were anti-dilutive and not included in diluted earnings per common share for fiscal 2015, fiscal 2014, and fiscal 2013 were 880,589; 489,064; and 280,764, respectively.

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