Note 4 - Revenue From Contracts With Customers - Change in Deferred Revenue and Accumulated Deficit (Details) - USD ($) |
Dec. 31, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Deferred revenue | $ 726,061 | ||
| Accumulated deficit | $ (336,722,905) | (320,608,968) | $ (319,908,968) |
| Calculated under Revenue Guidance in Effect before Topic 606 [Member] | |||
| Deferred revenue | 26,061 | ||
| Accumulated deficit | $ (319,908,968) | ||
| Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | |||
| Deferred revenue | 700,000 | ||
| Accumulated deficit | $ (700,000) |
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. No definition available.
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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