Stockholders' Equity (Narrative) (Details) | Jul. 02, 2019USD ($)$ / sharesshares | Jun. 28, 2019USD ($) | Jun. 21, 2018shares | Apr. 17, 2018USD ($) | Apr. 13, 2018agreement$ / sharesshares | Jun. 30, 2019USD ($)$ / sharesshares | Jun. 30, 2019USD ($)$ / sharesshares | Jun. 30, 2018USD ($) | Jun. 26, 2019$ / sharesshares | Dec. 31, 2018USD ($)$ / sharesshares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Common stock, shares issued | | | | | | 94,378,200 | 94,378,200 | | | 75,501,394 |
Proceeds from issuance of private placement | $ | | | | | | | $ 17,000 | $ 29,000 | | |
Proceeds from public offering | $ | | $ 13,800,000 | | $ 13,500,000 | | | | | | |
Common stock value | $ | | | | | | $ 94,000 | $ 94,000 | | | $ 75,000 |
Preferred stock, shares issued | | | | | | 0 | 0 | | | 0 |
Preferred stock, par value | $ / shares | | | | | | $ 0.001 | $ 0.001 | | | $ 0.001 |
Shares converted | | | | | | | 50,000 | | | |
Subsequent Event [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Proceeds from public offering | $ | $ 2,092,500 | | | | | | | | | |
2019 Stock Incentive Plan [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Share based compensation shares reserved for issuance | | | | | | 10,492,283 | 10,492,283 | | | |
Share based compensation shares authorized for grants | | | | | | 10,492,283 | 10,492,283 | | | |
2019 Stock Incentive Plan [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Share based compensation shares reserved for issuance | | | | | | 100,000 | 100,000 | | | |
2019 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.01 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | 100,000 | | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.01 | $ 1.01 | | | |
2019 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.01 [Member] | Stock Option [Member] | Year Four Anniversary [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | 25.00% | | | | |
2010 Stock Incentive Plan [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Share based compensation shares reserved for issuance | | | | | | 7,159,586 | 7,159,586 | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | Restricted Stock [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Restricted shares granted | | | | | | | 190,909 | | | |
Fair value of restricted share units | $ | | | | | | | $ 252,000 | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | Restricted Stock [Member] | April 1, 2019 [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | Restricted Stock [Member] | June 1, 2019 [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | Restricted Stock [Member] | September 1, 2019 [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | Restricted Stock [Member] | December 1, 2019 [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2010 Stock Incentive Plan [Member] | Non-Employee Directors [Member] | $1.29 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 402,584 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.29 | $ 1.29 | | | |
2010 Stock Incentive Plan [Member] | Certain Consultants [Member] | Restricted Stock [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Restricted shares granted | | | | | | | 11,667 | | | |
Fair value of restricted share units | $ | | | | | | | $ 10,000 | | | |
2010 Stock Incentive Plan [Member] | Certain Consultants [Member] | $0.47 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 50,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | 0.47 | $ 0.47 | | | |
2010 Stock Incentive Plan [Member] | Certain Consultants [Member] | $1.29 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 100,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.29 | $ 1.29 | | | |
2010 Stock Incentive Plan [Member] | Certain Consultants [Member] | $1.28 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | 35,001 | | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.28 | $ 1.28 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $0.47 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 575,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | 0.47 | $ 0.47 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $0.71 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 55,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | 0.71 | $ 0.71 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $0.77 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 125,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | 0.77 | $ 0.77 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.29 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | | 1,073,000 | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.29 | $ 1.29 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.29 [Member] | Stock Option [Member] | Year Four Anniversary [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.28 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | 14,000 | | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.28 | $ 1.28 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.13 [Member] | Stock Option [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Granted | | | | | | 20,000 | | | | |
Stock options granted, average exercise price | $ / shares | | | | | | $ 1.13 | $ 1.13 | | | |
2010 Stock Incentive Plan [Member] | Certain Officers And Employees [Member] | $1.13 [Member] | Stock Option [Member] | Year Four Anniversary [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Vesting percentage | | | | | | | 25.00% | | | |
2019 Offerings [Member] | Common Stock [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Common stock, shares issued | | | | | | | | | 18,750,000 | |
Underwriting agreement, per share | $ / shares | | | | | | | | | $ 0.80 | |
Underwriting agreement | | | | | | | | | 2,812,500 | |
Proceeds from public offering | $ | | $ 13,800,000 | | | | | | | | |
2019 Offerings [Member] | Common Stock [Member] | Subsequent Event [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Common stock, shares issued | 2,812,500 | | | | | | | | | |
Price per share | $ / shares | $ 0.80 | | | | | | | | | |
Proceeds from public offering | $ | $ 2,092,500 | | | | | | | | | |
2018 Offerings [Member] | Series B Convertible Preferred Stock [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Underwriting agreement, per share | $ / shares | | | | | $ 100 | | | | | |
Proceeds from public offering | $ | | | | $ 4,496,000 | | | | | | |
Preferred stock, shares issued | | | | | 50,000 | | | | | |
Preferred stock, par value | $ / shares | | | | | $ 0.001 | | | | | |
Percentage of underwriting costs and other offering costs | | | | 7.00% | | | | | | |
Shares converted | | | 50,000 | | | | | | | |
2018 Offerings [Member] | Common Stock [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Number of underwriting agreements | agreement | | | | | 2 | | | | | |
Common stock, shares issued | | | | | 10,000,000 | | | | | |
Underwriting agreement, per share | $ / shares | | | | | $ 1 | | | | | |
Underwriting agreement | | | | | 1,500,000 | | | | | |
Proceeds from public offering | $ | | | | $ 8,992,000 | | | | | | |
Common stock issuable per preferred share | | | 100 | | | | | | | |
Percentage of underwriting costs and other offering costs | | | | 7.00% | | | | | | |