Stockholders' Equity

6 Months Ended

Jun. 30, 2019

Stockholders’ Equity

Preferred stock and convertible preferred stock consist of the following:



	6/30/2019		12/31/2018
Preferred stock, $0.001 par value; 5,000,000 shares authorized at June 30, 2019 and December 31, 2018; no shares issued and outstanding at June 30, 2019 and December 31, 2018	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at June 30, 2019 and December 31, 2018; 200 shares issued and outstanding at June 30, 2019 and December 31, 2018	$	1	$	1
Series D convertible preferred stock, $0.001 par value; 21,300 shares designated at June 30, 2019 and December 31, 2018; 11,054.73 and 14,052.93 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	$	10	$	14
Series E convertible preferred stock, $0.001 par value; 7,000 shares designated at June 30, 2019 and December 31, 2018; zero and 3,260.70 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	$	—	$	3

2019 equity activity

During the six months ended June 30, 2019, 2,998.20 shares of the Series D Preferred Stock were converted into a total of 1,140,000 shares of Common Stock and 3,260.70 shares of the Series E Preferred Stock were converted into a total of 1,239,810 shares of Common Stock.

2018 equity activity

During the six months ended June 30, 2018, the Company issued shares of fully vested common stock in partial settlement of outstanding management incentive compensation. The issuance involved 214,791 shares with an aggregate value of $294,264, reflecting the $1.37 closing price of the Company’s common stock as reported on the Nasdaq Capital Market on April 12, 2018.

During the six months ended June 30, 2018, 3,739.3 shares of the Series E Preferred Stock were converted into a total of 1,421,787 shares of Common Stock and 7,927.05 shares of the Series F Preferred Stock were converted into a total of 3,014,087 shares of Common Stock.