Stockholder's Deficit (Tables)

6 Months Ended

Jun. 30, 2020

Schedule of Share Authorized to be Issue and Available for Grant

The following number of shares were authorized to be issued and available for grant as of June 30, 2020 and June 30, 2019:

	June 30, 2020
	2017 Plan		2013 Plan
Shares authorized to be issued		1,066,160		2,050,244
Shares available for grant		20,817		—
	June 30, 2019
	2017 Plan		2013 Plan
Shares authorized to be issued		981,800		2,074,604
Shares available for grant		201,183		—

Schedule of Stock Compensation Expense

Total stock compensation expense for the Plans was as follows:

	Three Months Ended June 30,
	2020								2019
	2017 plan				2013 plan				2017 plan				2013 plan
	Options		Restricted Stock		Options		Total		Options		Restricted Stock		Options		Total
Cost of revenue	$	342	$	—	$	61	$	403	$	205	$	—	$	147	$	352
Selling, general and administrative expense		299		370		68		737		145		110		687		942
	$	641	$	370	$	129	$	1,140	$	350	$	110	$	834	$	1,294

	Six Months Ended June 30,
	2020								2019
	2017 plan				2013 plan				2017 plan				2013 plan
	Options		Restricted Stock		Options		Total		Options		Restricted Stock		Options		Total
Cost of revenue	$	697	$	—	$	131	$	828	$	345	$	—	$	293	$	638
Selling, general and administrative expense		586		740		136		1,462		272		212		1,400		1,884
	$	1,283	$	740	$	267	$	2,290	$	617	$	212	$	1,693	$	2,522

Summary of Weighted Average Assumptions Used in Black-Sholes Option-pricing Model

The following weighted-average assumptions were used in the Black-Sholes option-pricing model calculation for the six months ended June 30, 2020 and June 30, 2019:

	June 30, 2020			June 30, 2019
Common stock value (per share)	$	31.60		$	26.90
Expected volatility		45.26	%		48.42	%
Risk-free interest rate		0.49	%		2.19	%
Expected life (years)		7			7
Forfeiture rate	None			None
Dividend rate	None			None

Schedule of Common Stock Reserved for Future Issuance

Common Stock Reserved for Future Issuances—At June 30, 2020 and June 30, 2019, the Company has reserved certain stock of its authorized but unissued common stock for possible future issuance in connection with the following:

	June 30, 2020		December 31, 2019
Warrants		2,002,550		650,590
Montrose 2013 Stock Incentive Plan		2,050,244		2,058,619
Montrose 2017 Stock Incentive Plan		1,066,160		997,785
Common stock reserved for future issuance		5,118,954		3,706,994

Montrose Amended & Restated 2017 Stock Incentive Plan

Summary of Stock Option Activity

The following summarizes the options activity of the 2017 Plan for the six months ended June 30, 2020 and June 30, 2019:

	Options to Purchase Common Stock			Weighted- Average Exercise Price per Share		Weighted Average Grant Date Fair Value per Share		Weighted Average Remaining Contract Life (in Years)		Aggregate Intrinsic Value of In-The- Money Options (in Thousands)
Outstanding at December 31, 2018		257,762		$	20	$	10		—	$	1,151
Granted		308,990			24		13
Forfeitured/cancelled		(14,800	)		24
Outstanding at June 30, 2019		551,952			23		12		—		2,136
Outstanding at December 31, 2019		617,852			24		12		7.82		4,696
Granted		160,712			32		12
Forfeitured/cancelled		(5,500	)		20
Outstanding at June 30, 2020		773,064			26		12		8.03		4,651
Options vested and expected to vest		773,064		$	26				8.57	$	4,651

Montrose Amended and Restated 2013 Stock Option Plan

Summary of Stock Option Activity

Montrose Amended & Restated 2013 Stock Option Plan—The following summarizes the activity of the 2013 Plan for the six months ended June 30, 2020 and June 30, 2019:

	Options to Purchase Common Stock			Weighted- Average Exercise Price per Share		Weighted Average Grant Date Fair Value per Share		Weighted Average Remaining Contract Life (in Years)		Aggregate Intrinsic Value of In-The- Money Options (in Thousands)
Outstanding at December 31, 2018		1,900,404		$	6	$	1		7.30		33,290
Forfeitured/ cancelled		(12,600	)		14
Expired		(4,475	)		8
Exercised		(11,385	)		5						283
Outstanding at June 30, 2019		1,871,944			6		1		6.87		38,235
Outstanding at December 31, 2019		1,855,469			6		1		6.40		46,617
Forfeitured/ cancelled		(1,250	)		6
Expired		(8,550	)		6
Exercised		(3,500	)		6						89
Outstanding at June 30, 2020		1,842,169			6		1		5.91		46,276
Options vested and expected to vest		1,842,169			6				5.43		46,276