Note 9 - Income Taxes - Reconciliation of the Statutory Federal Income Tax Rate (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Expected federal tax expense (benefit), amount | $ (5,106,100) | $ (3,071,300) |
| Expected federal tax expense (benefit) | (34.00%) | (34.00%) |
| State tax provision, net of federal benefit, amount | $ (735,500) | $ (387,500) |
| State tax provision, net of federal benefit | (4.90%) | (4.29%) |
| Effect of increase in valuation allowance, amount | $ 6,042,900 | $ 3,519,800 |
| Effect of increase in valuation allowance | 40.24% | 38.97% |
| Permanent differences, amount | $ 108,800 | $ (58,800) |
| Permanent differences | 0.72% | (0.65%) |
| Uncertain tax positions, amount | $ (46,500) | |
| Uncertain tax positions | (0.51%) | |
| Effect of changed state rates for deferred, amount | $ (80,100) | |
| Effect of changed state rates for deferred | (0.89%) | |
| Other, net, amount | $ (145,700) | $ (111,500) |
| Other, net | (0.97%) | (1.23%) |
| Provision (Benefit), amount | $ 164,429 | $ (235,855) |
| Provision (Benefit) | 1.09% | (2.60%) |