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Note 15 - Financial Information About the Parent, the Issuer and the Guarantors (Details) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | $ 6,808 | $ 21,145
Cash flows from investing activities: |  |
Acquisitions | 1,991 |
Proceeds from the disposal of property, plant and equipment | 3,305 | 770
Change in restricted cash and investments | (500) | (499)
Purchases of marketable securities |  | 3,990
Sales of marketable securities | 5,075 | 5,920
Other | (44) | (83)
Net cash provided by (used in) investing activities | 1,523 | (23)
Cash flows from financing activities: |  |
Payments on long-term debt | 150 | 118
Dividends paid | 2,900 | 2,605
Other | 4 | 140
Net cash provided by (used in) financing activities | (3,046) | (2,583)
Effect of exchange rate changes on cash | (153) | 84
Net increase (decrease) in cash and cash equivalents | 5,132 | 18,623
Cash & cash equivalents at beginning of period | 109,176 | 72,601
Cash & cash equivalents at end of period | 114,308 | 91,224
Parent Company [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 2,900 | 2,477
Cash flows from financing activities: |  |
Dividends paid | (2,900) | (2,605)
Other |  | 128
Net cash provided by (used in) financing activities | (2,900) | (2,477)
Subsidiary Issuer [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 1,030 | 15,198
Cash flows from investing activities: |  |
Capital expenditures | (276) | (159)
Proceeds from the disposal of property, plant and equipment | 953 | 18
Change in restricted cash and investments | 500 | 499
Purchases of marketable securities |  | (3,990)
Sales of marketable securities | 5,075 | 5,920
Other | 44 | 83
Net cash provided by (used in) investing activities | 6,296 | 2,371
Cash flows from financing activities: |  |
Other | 4 | 12
Net cash provided by (used in) financing activities | 4 | 12
Net increase (decrease) in cash and cash equivalents | 7,330 | 17,581
Cash & cash equivalents at beginning of period | 95,567 | 57,307
Cash & cash equivalents at end of period | 102,897 | 74,888
Guarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 1,892 | 2,707
Cash flows from investing activities: |  |
Capital expenditures | (4,933) | (2,994)
Acquisitions | (1,991) |
Proceeds from the disposal of property, plant and equipment | 2,352 | 752
Net cash provided by (used in) investing activities | (4,572) | (2,242)
Cash flows from financing activities: |  |
Payments on long-term debt | (150) | (118)
Net cash provided by (used in) financing activities | (150) | (118)
Net increase (decrease) in cash and cash equivalents | (2,830) | 347
Cash & cash equivalents at beginning of period | 10,347 | 12,463
Cash & cash equivalents at end of period | 7,517 | 12,810
Non-Guarantor Subsidiaries [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 986 | 763
Cash flows from investing activities: |  |
Capital expenditures | (201) | (152)
Net cash provided by (used in) investing activities | (201) | (152)
Cash flows from financing activities: |  |
Effect of exchange rate changes on cash | (153) | 84
Net increase (decrease) in cash and cash equivalents | 632 | 695
Cash & cash equivalents at beginning of period | 3,262 | 2,831
Cash & cash equivalents at end of period | 3,894 | 3,526
Consolidated Entities [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 6,808 | 21,145
Cash flows from investing activities: |  |
Capital expenditures | (5,410) | (3,305)
Acquisitions | (1,991) |
Proceeds from the disposal of property, plant and equipment | 3,305 | 770
Change in restricted cash and investments | 500 | 499
Purchases of marketable securities |  | (3,990)
Sales of marketable securities | 5,075 | 5,920
Other | 44 | 83
Net cash provided by (used in) investing activities | 1,523 | (23)
Cash flows from financing activities: |  |
Payments on long-term debt | (150) | (118)
Dividends paid | (2,900) | (2,605)
Other | 4 | 140
Net cash provided by (used in) financing activities | (3,046) | (2,583)
Effect of exchange rate changes on cash | (153) | 84
Net increase (decrease) in cash and cash equivalents | 5,132 | 18,623
Cash & cash equivalents at beginning of period | 109,176 | 72,601
Cash & cash equivalents at end of period | $ 114,308 | $ 91,224

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. 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. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. 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. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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