The Company has adopted an Employee Stock Purchase Plan (“ESPP”) that, as amended and approved by the Stockholders in May 2011, allows the Company to sell up to 125,000 shares of common stock to employees. The employee stock purchases are achieved through accumulated payroll deductions, and are transacted at 95% of the fair market value of the shares, under terms described in the ESPP. During the years ended December 31, 2018 and 2017, the Company issued 7,614 and 7,151 shares of common stock, respectively, in connection with the ESPP.

The Company has also adopted the 2007 Employee Stock Incentive Plan (“ESIP”) for the benefit of its employees. The Stockholders’ made available up to 2,200,000 shares of common stock under ESIP, as amended in June 2018. Awards under the ESIP are granted as restricted stock units (“RSUs”) and the number of RSUs awarded is generally subject to the substantial achievement of budgeted performance and other metrics in the year granted. The RSUs do not include the voting rights of the Company’s common stock, and the shares of common stock underlying the RSUs are not considered issued and outstanding until actually vested and issued. In general, the RSU awards convert to common stock on a one to one basis in 25% increments over four years from the grant date subject to a continuing employment obligation.

In connection with the sale of the Company’s U.S. operations in August 2018, as discussed in Note 16, most of the Company’s U.S. employees, with the exception of certain key members of management, became employees of Myers Power Products, Inc. (the “Buyer”). Effective with the sale, all RSUs held by employees that continued employment with the Buyer immediately vested.

The following table summarizes the activity for unvested restricted stock units for the years ended December 31, 2018 and 2017:

	Units			Weighted Average Fair Value Per RSU
Unvested restricted stock units at December 31, 2016		218,412			4.28
Awarded		56,759			1.48
Vested		(112,340	)		3.99
Forfeited		(2,289	)		4.41
Unvested restricted stock units at December 31, 2017		165,120			$	3.40
Awarded		91,000			1.35
Vested		(154,874	)		2.87
Forfeited		(96,215	)		2.51
Unvested restricted stock units at December 31, 2018		5,031			$	2.92

Compensation expense of approximately $0.52 million and $0.30 million was recorded in the years ended December 31, 2018 and 2017, respectively, to reflect the fair value of the original RSU’s granted or anticipated to be granted less forfeitures, amortized over the portion of the vesting period occurring during the period. The fair value of the RSUs was based on the closing price of our common stock as reported on the NASDAQ Stock Market on the grant date. Based upon the fair value on the grant date of the number of shares awarded or expected to be awarded, it is anticipated that approximately $20,000 of additional compensation cost will be recognized in future periods through 2021. The weighted average period over which this additional compensation cost will be expensed is 3 years.

Directors who are not employees of the Company and who do not have a compensatory agreement providing for service as a director of the Company receive a retainer fee payable quarterly. Eligible directors may elect to defer 50% to 100% of their retainer fee, which may be used to acquire common stock of the Company at the fair market value on the date the retainer fee would otherwise be paid, or be paid in cash.. Compensation expense of approximately $0.2 million and $0.08 million was recorded in the years ended December 31, 2018 and 2017 respectively, which is included in general and administrative expenses in the consolidated statements of operations.