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Note 3 - Investments (Details Textual) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 30, 2016 | Mar. 31, 2020 | Jun. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019
Equity Method Investments |  | $ 0 |  |  |  |
Cost-method Investments, Other than Temporary Impairment |  |  |  | $ 1,009,000 |  |
Long-term Investments [Member] |  |  |  |  |  |
Equity Method Investments |  |  |  | 1,921,000 |  |
Equity Method Investments [Member] | Investment Income (Expense) [Member] |  |  |  |  |  |
Gain (Loss) on Investments, Total |  |  |  | 400,000 | $ 332,000 |
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 40.00%
Investments, Unfunded Commitments | $ 1,000,000 |  |  |  |  |
Investment, Unfunded Commitments, to Be Held in Escrow | $ 500,000 |  |  |  |  |
Lumense Inc. [Member] |  |  |  |  |  |
Cost-method Investments, Other than Temporary Impairment |  | $ 750,000 | $ 250,000 |  |  |
Lumense Inc. [Member] | Other Current Liabilities [Member] |  |  |  |  |  |
Deposit Liability, Current |  |  |  | $ 3,335,000 |  |
NKD Enterprises LLC [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 25.50% |
Ownership Percentage |  |  |  | 10.00% |  |
NKD Enterprises LLC [Member] | Investment Income [Member] |  |  |  |  |  |
Proceeds from Cost Method Investment, Distribution |  |  |  | $ 230,000 |  |

X
- Definition The amount of unfunded commitments for which the entity is obligated to pay in connection to an investment that will be held in an escrow account upon funding. + References No definition available. + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References No definition available. + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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