DoubleVerify Holdings, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, shares in Thousands, $ in Thousands					3 Months Ended		9 Months Ended
	Oct. 27, 2021 shares	Oct. 06, 2021 shares	Apr. 23, 2021 USD ($) $ / shares shares	Apr. 09, 2021 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($)	Mar. 29, 2021 $ / shares	Dec. 31, 2020 $ / shares shares
Granted							1,707
Underwriting discount fees \| $							$ 21,797	$ 1,230
Stock offering cost \| $							$ 21,797	$ 1,852
Treasury stock, shares reissued \| $			$ 15,146
Common stock, par value \| $ / shares					$ 0.001		$ 0.001		$ 0.001	$ 0.001
Preferred stock, par value \| $ / shares					$ 0.01		$ 0.01		$ 0.01	$ 0.01
Common stock, shares authorized					1,000,000		1,000,000			700,000
Preferred stock, shares authorized					100,000		100,000			61,006
Stock options
Number of days option to purchase							4 years
Stock options \| 2021 Omnibus Equity Incentive Plan \| Subsequent Event
Granted	11
Restricted Stock Units (RSUs)
Granted							1,720
Number of days option to purchase							4 years
Restricted Stock Units (RSUs) \| 2021 Omnibus Equity Incentive Plan \| Subsequent Event
Granted	36	13
Private Placement
Purchase price \| $						$ 30,000
IPO
Number of shares issued			9,977
Purchase price \| $						$ 269,390
Purchase price per share \| $ / shares			$ 27.00
Aggregate net proceeds \| $			$ 253,200
Underwriting discount fees \| $			16,200
Stock offering cost \| $			$ 26,800
Number of shares converted			20,335
Convertible preferred stock, conversion ratio			1
Common stock, par value \| $ / shares					$ 0.001		$ 0.001
Preferred stock, par value \| $ / shares					$ 0.01		$ 0.01			$ 0.01
Common stock, shares authorized					1,000,000		1,000,000			1,000,000
Preferred stock, shares authorized					100,000		100,000			100,000
Underwriter Option
Number of shares issued			1,350
Tiger Global Management, LLC \| Private Placement
Number of shares issued				1,111
Purchase price per share \| $ / shares				$ 27.00
Gross proceeds \| $				$ 30,000
Aggregate net proceeds \| $				29,000
Underwriting discount fees \| $				$ 1,000
Providence \| Private Placement
Number of shares issued			5,356
Providence \| Underwriter Option
Number of shares issued			650
General and administrative \| IPO
Stock offering cost \| $					$ 0		$ 21,800