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v3.19.1

Note H - Investment in and Transactions with Unconsolidated Subsidiaries (Details Textual) | 1 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2014 USD ($) | Nov. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase |  |  |  |  | $ (250,000) | $ 250,000
Income (Loss) from Equity Method Investments, Total |  |  |  |  | 329,700 | (120,510)
Milestone China [Member] |  |  |  |  |  |
Equity Method Investments |  |  | $ 1,000,000 |  | 0 | 0
Long-term Purchase Commitment, Minimum Quantity Required |  |  | 772 |  |  |
Equity Method Investment, Ownership Percentage |  |  | 40.00% |  |  |
Financing Receivable, Net, Total |  |  |  |  | 2,800,000 |
Equity Method Investment, Deferred Gain on Sale |  | $ 1,400,000 |  |  |  |
Revenue from Related Parties |  |  |  |  | 900,000 | 2,071,000
Contract with Customer, Liability, Total |  |  |  |  | 100,000 | 1,700,000
Capitalized Contract Cost, Net, Total |  |  |  |  | 500,000 | 1,100,000
Account Receivables, Related Party, Monthly Payment |  |  |  | $ 200,000 |  |
Accounts Receivable, Related Party, Balloon Payment to be Paid |  |  |  | $ 1,425,000 |  |
Proceeds from Collection of Finance Receivables |  |  |  |  | $ 900,000 |
Equity Method Investment, Deferred Intercompany Profit (Loss), Percentage |  |  |  |  | 40.00% |
Income (Loss) from Equity Method Investments, Total |  |  |  |  | $ (329,700) | 120,510
Cost-method Investments, Realized Losses |  |  |  |  | 3,380,388 | 3,147,470
Inventory Adjustments, Total |  |  |  |  | 1,250,000 |
Milestone China [Member] | Accounts Receivable from Related Parties [Member] |  |  |  |  |  |
Equity Method Investment, Deferred Intercompany Profit (Loss) |  |  |  |  | $ 421,800 | $ 751,500
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 40.00% |  |  |  |
Option to Repurchase, Period |  | 10 years |  |  |  |
Price for Shares of Variable Interest Entity Interest Sold |  | $ 1,400,000 |  |  |  |
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase |  | 125,000 |  |  |  |
Financing Receivable, Net, Total |  | 1,275,000 |  |  |  |
Note Receivable, Quarterly Installment Amount |  | 125,000 |  |  |  |
Option to Repurchase Variable Interest Entity Shares, Purchase Price |  | $ 1,400,000 |  |  |  |
Option to Repurchase Variable Entity Shares at Specified Purchase Price, Period |  | 2 years |  |  |  |
Equity Method Investment, Deferred Gain on Sale |  | $ 1,400,000 |  |  |  |
Variable Interest Entity Ownership Percentage Sold |  | 40.00% |  |  |  |
Notes Receivable, Reversal Amount | $ 1,150,000 |  |  |  |  |
Equity Method Investment, Reversal of Deferred Gain on Sale | 1,400,000 |  |  |  |  |
Termination Agreement, Gain (Loss) on Transaction | 0 |  |  |  |  |
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member] | Upon Exercise of Default Agreement [Member] |  |  |  |  |  |
Return Obligation, Amount | $ 250,000 |  |  |  |  |

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- Definition The aggregate amount of deferred intercompany profits and losses on transactions between the Entity and unconsolidated subsidiaries (including certain corporate joint ventures, and noncontrolled corporations), accounted for under the equity method of accounting,as of the balance sheet date. + References No definition available. + Details
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