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Note 7 - Computations of Basic and Diluted Loss Per Common Share (Details) (USD $)
 3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Numerator for basic and diluted earnings per share:        
Net income from continuing operations $ 1,857,000us-gaap_IncomeLossFromContinuingOperations $ 2,756,000us-gaap_IncomeLossFromContinuingOperations $ 3,225,000us-gaap_IncomeLossFromContinuingOperations $ 5,034,000us-gaap_IncomeLossFromContinuingOperations
Payment of preferred stock dividends (22,000)us-gaap_DividendsPreferredStock (27,000)us-gaap_DividendsPreferredStock (74,000)us-gaap_DividendsPreferredStock (82,000)us-gaap_DividendsPreferredStock
Net income from continuing operations available to common stockholders 1,784,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 2,201,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 982,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 3,058,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Loss from discontinued operations, net of tax    (528,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (684,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (1,520,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Loss on sale of discontinued operations, net of tax (51,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax   (1,485,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax (374,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Weighted average shares used in computation - basic (in shares) 29,597,525us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 54,264,017us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 41,021,199us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 54,122,392us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Assumed conversion of preferred stock (in shares) 1,727,768us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock 2,095,784us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock 1,727,768us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock 2,095,784us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock
Effect of outstanding stock options (in shares) 710,234us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 877,526us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 542,715us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 716,773us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average shares used in computation - diluted (in shares) 32,035,527us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 57,237,327us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 43,291,682us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 56,934,949us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings (loss) per common share attributable to common shareholders – basic:        
Income from continuing operations per common share (in dollars per share) $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.08us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.09us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Loss from discontinued operations per common share (in dollars per share)   $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare $ (0.05)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare $ (0.04)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Earnings per common share attributable to common stockholders – basic (in dollars per share) $ 0.06us-gaap_EarningsPerShareBasic $ 0.04us-gaap_EarningsPerShareBasic $ 0.03us-gaap_EarningsPerShareBasic $ 0.05us-gaap_EarningsPerShareBasic
Earnings (loss) per common share attributable to common shareholders – diluted:        
Income from continuing operations per common share (in dollars per share) $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.07us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.09us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Loss from discontinued operations per common share (in dollars per share)   $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare $ (0.05)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare $ (0.04)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Earnings per common share attributable to common shareholders – diluted (in dollars per share) $ 0.06us-gaap_EarningsPerShareDiluted $ 0.04us-gaap_EarningsPerShareDiluted $ 0.02us-gaap_EarningsPerShareDiluted $ 0.05us-gaap_EarningsPerShareDiluted
Continuing Operations [Member]        
Numerator for basic and diluted earnings per share:        
Net income from continuing operations available to common stockholders $ 1,835,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentContinuingOperationsMember		 $ 2,729,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentContinuingOperationsMember		 $ 3,151,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentContinuingOperationsMember		 $ 4,952,000us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentContinuingOperationsMember