Note 6 - Preferred Stock and Common Stock (Details Textual) | Jun. 30, 2017USD ($) | Jun. 20, 2017 | Feb. 29, 2016USD ($)shares | Mar. 31, 2019USD ($)shares | Sep. 30, 2017shares | Dec. 31, 2017USD ($)$ / sharesshares | Dec. 31, 2018USD ($)shares | Dec. 31, 2017USD ($)$ / sharesshares | Apr. 30, 2017USD ($)shares |
Proceeds from Issuance of Private Placement | $ | | | | | | $ 1,940,005 | | $ 1,940,005 | |
Convertible Preferred Stock Converted to Other Securities | $ | $ 148,125 | | | | | | | | |
Common Stock, Shares, Issued, Total | | | | 2,610,568 | | 2,610,568 | 2,610,568 | 2,610,568 | |
Preferred Stock, Dividend Rate, Percentage | | | | 10.00% | | | | | |
Preferred Stock, Amount of Preferred Dividends in Arrears | $ | | | | $ 27,361 | | | $ 27,361 | | |
Preferred Stock, Amount of Preferred Dividends Undeclared and Unaccrued | $ | | | | $ 11,250 | | | $ 10,000 | | |
Board of Directors, Officers, and Officers of Subsidiary [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 838,060 | | | 838,060 | | |
Percentage of Outstanding of Common Stock | | | | 32.10% | | | 32.10% | | |
Marino Family Holdings LLC [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 351,966 | | | 351,966 | | |
Banyan Rail Holdings LLC [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 91,348 | | | 91,348 | | |
Series A Preferred Stock Holders [Member] | | | | | | | | | |
Stock Issued During Period, Shares, Stock Splits | | | | | 257,831 | | | | |
Series A Preferred Stock [Member] | | | | | | | | | |
Convertible Preferred Stock, Shares Issued upon Conversion | | | | | | | | | 20 |
Shares Issued for Each Dollar of Preferred Dividend | | | | | | | | | 0.2 |
Convertible Preferred Stock, Total Shares Issued upon Conversion | | | | | | | | | 9,875 |
Dividends Payable | $ | | | | | | | | | $ 301,656 |
Preferred Stock, Dividend Rate, Percentage | | | | 10.00% | | | | | |
Common Stock Dividends, Shares | | | 29,856 | | | | | | |
Dividends, Common Stock, Total | $ | | | $ 29,249 | | | | | | |
Shares After Reverse Stock Split [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 1,056,903 | | | | | |
Share From Private Placement [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 1,293,334 | | | | | |
Shares from Prior Year Private Placement [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 2,500 | | | | | |
Shares From Preferred Stock and Preferred Dividend Exchange [Member] | | | | | | | | | |
Common Stock, Shares, Outstanding, Ending Balance | | | | 257,831 | | | | | |
Private Placement [Member] | | | | | | | | | |
Shares Issued, Price Per Share | $ / shares | | | | | | $ 1.50 | | $ 1.50 | |
Stock Issued During Period, Shares, New Issues | | | | | | 1,293,334 | | 2,500 | |
Reverse Stock Split [Member] | | | | | | | | | |
Stockholders' Equity Note, Stock Split, Conversion Ratio | | 10 | | 10 | | | | | |