ShotSpotter (SSTI) 10-Q 15 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Trading Symbol	SSTI
Entity Registrant Name	ShotSpotter, Inc.
Entity Central Index Key	0001351636
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity File Number	001-38107
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-0949915
Entity Address, Address Line One	39300 Civic Center Dr.
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Fremont
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94538
City Area Code	510
Local Phone Number	794-3100
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		11,675,860
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common stock, par value $0.005 per share
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 13,114	$ 16,043
Accounts receivable and contract asset	13,374	12,921
Prepaid expenses and other current assets	2,880	2,172
Total current assets	29,368	31,136
Property and equipment, net	16,493	15,346
Operating lease right-of-use assets	491	882
Goodwill	2,816	2,811
Intangible assets, net	13,807	14,540
Other assets	1,924	1,605
Total assets	64,899	66,320
Current liabilities
Accounts payable	1,443	1,192
Deferred revenue, short-term	21,218	24,174
Accrued expenses and other current liabilities	5,869	5,613
Total current liabilities	28,530	30,979
Deferred revenue, long-term	612	405
Other liabilities	481	631
Total liabilities	29,623	32,015
Stockholders' equity
Preferred stock
Common stock	58	58
Additional paid-in capital	130,855	128,771
Accumulated deficit	(95,474)	(94,354)
Accumulated other comprehensive loss	(163)	(170)
Total stockholders' equity	35,276	34,305
Total liabilities and stockholders' equity	$ 64,899	$ 66,320

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Preferred stock, par value	$ 0.005	$ 0.005
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.005	$ 0.005
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	11,675,860	11,538,998
Common stock, shares outstanding	11,675,860	11,538,998

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenues	$ 14,547	$ 11,350	$ 44,184	$ 33,085
Costs
Cost of revenues	6,520	4,745	19,137	13,440
Impairment of property and equipment		161	25	161
Total costs	6,520	4,906	19,162	13,601
Gross profit	8,027	6,444	25,022	19,484
Operating expenses
Sales and marketing	4,018	2,400	11,881	7,237
Research and development	1,703	1,375	5,156	4,104
General and administrative	3,217	2,040	8,900	6,627
Total operating expenses	8,938	5,815	25,937	17,968
Operating (loss) income	(911)	629	(915)	1,516
Other income (expense), net
Interest income, net	8	3	28	101
Other expense, net	(46)	(58)	(184)	(173)
Total other income (expense), net	(38)	(55)	(156)	(72)
(Loss) income before income taxes	(949)	574	(1,071)	1,444
Provision (benefit) for income taxes		8	49	(1)
Net (loss) income	$ (949)	$ 566	$ (1,120)	$ 1,445
Net (loss) income per share, basic	$ (0.08)	$ 0.05	$ (0.10)	$ 0.13
Net (loss) income per share, diluted	$ (0.08)	$ 0.05	$ (0.10)	$ 0.12
Weighted average shares used in computing net (loss) income per share, basic	11,680,413	11,423,079	11,634,422	11,383,860
Weighted average shares used in computing net (loss) income per share, diluted	11,680,413	11,727,112	11,634,422	11,718,770

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (949)	$ 566	$ (1,120)	$ 1,445
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net	(14)	29	7	(174)
Comprehensive (loss) income	$ (963)	$ 595	$ (1,113)	$ 1,271

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2019	$ 27,251	$ 57	$ 122,907	$ (95,579)	$ (134)
Beginning balance, Shares at Dec. 31, 2019		11,314,150
Exercise of stock options	57		57
Exercise of stock options, Shares		17,543
Issuance of common stock in connection with exercise of warrants, Shares		46,939
Issuance of common stock from RSUs vested, Shares		20,297
Stock-based compensation	887		887
Other comprehensive income (loss)	(227)				(227)
Net income (loss)	13			13
Ending balance at Mar. 31, 2020	27,981	$ 57	123,851	(95,566)	(361)
Ending balance, Shares at Mar. 31, 2020		11,398,929
Beginning balance at Dec. 31, 2019	27,251	$ 57	122,907	(95,579)	(134)
Beginning balance, Shares at Dec. 31, 2019		11,314,150
Net income (loss)	1,445
Ending balance at Sep. 30, 2020	30,728	$ 57	125,113	(94,134)	(308)
Ending balance, Shares at Sep. 30, 2020		11,441,762
Beginning balance at Mar. 31, 2020	27,981	$ 57	123,851	(95,566)	(361)
Beginning balance, Shares at Mar. 31, 2020		11,398,929
Exercise of stock options	41		41
Exercise of stock options, Shares		26,562
Issuance of common stock from RSUs vested, Shares		22,754
Issuance of common stock from ESPP purchase	408		408
Issuance of common stock from ESPP purchase, Shares		21,431
Repurchase of common stock	(1,615)		(1,615)
Repurchase of common stock, Shares		(74,520)
Stock-based compensation	1,163		1,163
Other comprehensive income (loss)	24				24
Net income (loss)	866			866
Ending balance at Jun. 30, 2020	28,868	$ 57	123,848	(94,700)	(337)
Ending balance, Shares at Jun. 30, 2020		11,395,156
Exercise of stock options	69		69
Exercise of stock options, Shares		40,565
Issuance of common stock from RSUs vested, Shares		6,041
Stock-based compensation	1,196		1,196
Other comprehensive income (loss)	29				29
Net income (loss)	566			566
Ending balance at Sep. 30, 2020	30,728	$ 57	125,113	(94,134)	(308)
Ending balance, Shares at Sep. 30, 2020		11,441,762
Beginning balance at Dec. 31, 2020	34,305	$ 58	128,771	(94,354)	(170)
Beginning balance, Shares at Dec. 31, 2020		11,538,998
Exercise of stock options	213		213
Exercise of stock options, Shares		60,600
Issuance of common stock in connection with exercise of warrants	8		8
Issuance of common stock in connection with exercise of warrants, Shares		50,716
Issuance of common stock from RSUs vested, Shares		24,332
Repurchase of common stock	(2,192)		(2,192)
Repurchase of common stock, Shares		(56,162)
Stock-based compensation	1,375		1,375
Other comprehensive income (loss)	(17)				(17)
Net income (loss)	79			79
Ending balance at Mar. 31, 2021	33,771	$ 58	128,175	(94,275)	(187)
Ending balance, Shares at Mar. 31, 2021		11,618,484
Beginning balance at Dec. 31, 2020	$ 34,305	$ 58	128,771	(94,354)	(170)
Beginning balance, Shares at Dec. 31, 2020		11,538,998
Exercise of stock options, Shares	91,582
Repurchase of common stock	$ (3,600)
Repurchase of common stock, Shares	(95,151)
Net income (loss)	$ (1,120)
Ending balance at Sep. 30, 2021	35,276	$ 58	130,855	(95,474)	(163)
Ending balance, Shares at Sep. 30, 2021		11,675,860
Beginning balance at Mar. 31, 2021	33,771	$ 58	128,175	(94,275)	(187)
Beginning balance, Shares at Mar. 31, 2021		11,618,484
Exercise of stock options	364		364
Exercise of stock options, Shares		16,432
Issuance of common stock from RSUs vested, Shares		37,538
Issuance of common stock from ESPP purchase	462		462
Issuance of common stock from ESPP purchase, Shares		18,294
Repurchase of common stock	(491)		(491)
Repurchase of common stock, Shares		(12,585)
Stock-based compensation	1,494		1,494
Other comprehensive income (loss)	38				38
Net income (loss)	(250)			(250)
Ending balance at Jun. 30, 2021	35,388	$ 58	130,004	(94,525)	(149)
Ending balance, Shares at Jun. 30, 2021		11,678,163
Exercise of stock options	316		316
Exercise of stock options, Shares		14,550
Issuance of common stock from RSUs vested, Shares		9,551
Repurchase of common stock	(918)		(918)
Repurchase of common stock, Shares		(26,404)
Stock-based compensation	1,453		1,453
Other comprehensive income (loss)	(14)				(14)
Net income (loss)	(949)			(949)
Ending balance at Sep. 30, 2021	$ 35,276	$ 58	$ 130,855	$ (95,474)	$ (163)
Ending balance, Shares at Sep. 30, 2021		11,675,860

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net (loss) income	$ (1,120,000)	$ 1,445,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	4,298,000	3,975,000
Amortization of intangible assets	774,000	71,000
Impairment of property and equipment	25,000	161,000
Stock-based compensation	4,322,000	3,246,000
Loss on disposal of property and equipment		3,000
Provision for accounts receivable	13,000	41,000
Changes in operating assets and liabilities:
Accounts receivable and contract asset	(465,000)	6,976,000
Prepaid expenses and other assets	(1,077,000)	(273,000)
Accounts payable	417,000	(185,000)
Accrued expenses and other current liabilities	930,000	(336,000)
Deferred revenue	(2,742,000)	(6,315,000)
Net cash provided by operating activities	5,375,000	8,809,000
Cash flows from investing activities:
Purchase of property and equipment	(5,632,000)	(3,132,000)
Investment in intangible and other assets	(45,000)	(46,000)
Business acquisition purchase price adjustment	15,000
Net cash used in investing activities	(5,662,000)	(3,178,000)
Cash flows from financing activities:
Payment of contingent consideration liability	(403,000)	(347,000)
Payment of line of credit costs		(4,000)
Proceeds from exercise of stock options	893,000	167,000
Repurchases of common stock	(3,601,000)	(1,615,000)
Proceeds from exercise of warrants	8,000	0
Proceeds from employee stock purchase plan	462,000	408,000
Net cash provided by (used in) financing activities	(2,641,000)	(1,391,000)
(Decrease) increase in cash and cash equivalents	(2,928,000)	4,240,000
Effect of exchange rate on cash and cash equivalents	(1,000)	(124,000)
Cash and cash equivalents at beginning of year	16,043,000	24,550,000
Cash and cash equivalents at end of period	13,114,000	28,666,000
Supplemental cash flow disclosures:
Purchases of property and equipment included in accounts payable	$ 454,000	$ 143,000

Organization and Description of

Organization and Description of Business	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Note 1. Organization and Description of Business ShotSpotter, Inc. (the “Company”) provides precision-policing solutions for law enforcement and security personnel to help prevent and reduce gun violence and make cities, campuses and facilities safer. The Company’s flagship product, ShotSpotter Respond is the leading outdoor gunshot detection, location and alerting system trusted by 125 cities as of September 30, 2021. ShotSpotter Connect creates crime forecasts designed to enable more precise and effective use of patrol resources to deter crime. The Company’s case management solution, ShotSpotter Investigate, is a cloud-based investigative platform to help law enforcement agencies modernize every phase of an investigation and accelerate case work with easy-to-use software tools. The Company offers its solutions on a Software as a Service, ("SaaS"), subscription model to its customers. ShotSpotter Labs is the Company’s effort to support innovative uses of its technology to help protect wildlife and the environment. The Company’s principal executive offices are located in Fremont, California. The Company has five wholly-owned subsidiaries globally.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated financial statements include the results of the Company and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated upon consolidation. The accompanying condensed consolidated financial statements and related financial information should be read in conjunction with the consolidated financial statements filed with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (“Annual Report”) filed with the SEC on March 29, 2021. In the opinion of management, the accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive income (loss), stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations or cash flows to be anticipated for the full year 2021 or any future period. The Company has evaluated subsequent events occurring after the date of the condensed consolidated financial statements for events requiring recording or disclosure in the condensed consolidated financial statements. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates, including the valuation of accounts receivable, the lives and realization of tangible and intangible assets, contingent consideration liabilities, stock-based compensation expense, customer life, accounting for revenue recognition, contingent liabilities related to legal matters, and income taxes including deferred taxes and any related valuation allowance. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the Company’s financial position and results of operations. The Company records net deferred tax assets to the extent the Company believes these assets will more likely than not be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. In the event the Company determines that it would be able to realize its deferred assets in the future in excess of their net recorded amount, the Company makes an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. Concentrations of Risk Credit Risk – Financial instruments that potentially subject the Company to concentration of credit risk consisted primarily of cash and cash equivalents and accounts receivable from trade customers. The Company maintains its cash deposits at one domestic and four international financial institutions. The Company is exposed to credit risk in the event of default by a financial institution to the extent that cash and cash equivalents are in excess of the amount insured by the Federal Deposit Insurance Corporation and other local country government agencies. The Company generally places its cash and cash equivalents with high-credit quality financial institutions. To date, the Company has not experienced any losses on its cash and cash equivalents. Concentration of Accounts Receivable and Contract Asset – At September 30, 2021, two customers accounted for 22 % and 19 % of the Company’s total accounts receivable, respectively. At December 31, 2020, three customers accounted for 37 %, 27 % and 11 %, respectively, of the Company’s total accounts receivable. Concentration of Revenues – For the three months ended September 30, 2021, two customers accounted for 26 % and 14 % of the Company’s total revenues, respectively. For the three months ended September 30, 2020, two customers accounted for 18 % and 13 % of the Company’s total revenues, respectively. For the nine months ended September 30, 2021, two customers accounted for 30 % and 14 % of the Company’s total revenues, respectively. For the nine months ended September 30, 2020, two customers accounted for 18 % and 13 % of the Company’s total revenues, respectively. Concentration of Suppliers – The Company relies on a limited number of suppliers and contract manufacturers. In particular, a single supplier is currently the sole manufacturer of the Company’s proprietary sensors. Accounting Pronouncements Recently Adopted In December 2019, the FASB issued ASU 2019-12 , Income Taxes (Topic 740), simplifying the accounting for income taxes by removing certain exceptions to the general principles. The Company adopted this ASU as of January 1, 2021 . The adoption of this ASU did not have any impact on the Company’s condensed consolidated financial statements In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses (Topic 326) : Measurement of Credit Losses on Financial Instruments. The amendments in this ASU replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects current expected credit loss and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company adopted this ASU as of January 1, 2021 . The adoption of this ASU did not have a material impact on the Company’s condensed consolidated financial statements. Accounting Pronouncements Not Yet Adopted In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts from Customers . ASU 2021-08 aims to improve the accounting for acquired revenue contracts with customers in a business combination by addressing diversity in practice and inconsistency related to recognition of an acquired contract liability and the effect of payment terms on subsequent revenue recognized by the acquirer. These amendments are effective prospectively for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is allowed. The Company is currently assessing the impact the adoption of this ASU will have on its consolidated financial statements and related disclosures.

Revenue Related Disclosures

Revenue Related Disclosures	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue Related Disclosures	Note 3. Revenue Related Disclosures The changes in deferred revenue were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Balance at the beginning of period $ 19,791 $ 22,308 $ 24,579 $ 26,958 New billings 16,512 9,650 41,336 26,653 Revenue recognized during the period from balance at the beginning of the period ( 8,999 ) ( 9,519 ) ( 22,659 ) ( 22,790 ) Revenue recognized during the period from new billings ( 5,467 ) ( 1,796 ) ( 21,419 ) ( 10,178 ) Foreign currency impact ( 7 ) — ( 7 ) — Balance at end of period $ 21,830 $ 20,643 $ 21,830 $ 20,643 ​ ​ ​ ​ ​ ​ ​ The following table presents remaining performance obligations for contractually committed revenues as of September 30, 2021 (in thousands): Remainder of 2021 $ 24,318 2022 13,932 2023 10,683 Thereafter 10,269 Total $ 59,202 The timing of revenue recognition included in the table above is based on estimates of go-live dates for contracts not yet live. Contractually committed revenue includes deferred revenue as of September 30, 2021 and amounts under contract that will be invoiced after September 30, 2021. During the three months ended September 30, 2021, the Company recognized revenues of $ 14.3 million from customers in the United States, and $ 0.2 million from customers in the Bahamas and South Africa. During the nine months ended September 30, 2021, the Company recognized revenues of $ 43.6 million from customers in the United States, and $ 0.5 million from a customer in the Bahamas and South Africa. During the three months ended September 30, 2020, the Company recognized revenues of $ 11.2 million from customers in the United States, and $ 0.2 million from a customer in the Bahamas. During the nine months ended September 30, 2020, the Company recognized revenues of $ 32.6 million from customers in the United States, and $ 0.5 million from a customer in the Bahamas. During the three months ended September 30, 2021, the Company recognized revenues of $ 14.2 million from monthly subscription, maintenance and support services, and $ 0.3 million from professional software development services. During the nine months ended September 30, 2021, the Company recognized revenues of $ 41.1 million from monthly subscription, maintenance and support services, and $ 3.0 million from professional software development services. During the three and nine months ended September 30, 2020, all recognized revenues were from subscription, maintenance and support services.

Business Acquisition

Business Acquisition	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Business Acquisition	Note 4. Business Acquisition LEEDS During the fourth quarter of 2020, the Company acquired all the membership interests in LEEDS, LLC ("LEEDS"), a New Jersey based technology company. The purchase consideration included cash consideration of $ 21.6 million and $ 2.0 million in ShotSpotter common stock. The purchase consideration also included a contingent earnout payable based on LEEDS’ revenues generated during 2021 and 2022. The fair value of the contingent earnout was $ 0.2 million, resulting in a total purchase consideration of $ 23.8 million. The Company recorded $ 8.0 million of net tangible assets, $ 14.4 million of identifiable intangible assets and $ 1.4 million of goodwill.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 5. Fair Value Measurements In October 2018, upon the acquisition of certain technology, referred to as HunchLab, from Azavea, Inc., the Company recognized a contingent consideration liability classified within Level III of the fair value hierarchy because some of the inputs used in its measurement were neither directly nor indirectly observable. In January 2020 and February 2021, based on the relevant revenues earned during the second and third year respectively, of the three-year contingent consideration period, the Company paid $ 0.3 million and $ 0.4 million respectively, to Azavea, Inc., resulting in a reduction of the contingent consideration liability. In November 2020, using a Monte Carlo Simulation approach, the Company estimated the fair value of the contingent consideration at the acquisition date of LEEDS to be $ 0.2 million. There have been no changes in the assumptions or fair value of the contingent consideration liability at September 30, 2021. The changes in the fair value of contingent consideration liability for the nine months ended September 30, 2021 and 2020 are as follows (in thousands): Nine Months Ended September 30, 2021 2020 Balance, beginning of period $ 573 $ 750 Payment of contingent consideration liability ( 403 ) ( 347 ) Balance, end of period $ 170 $ 403

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Note 6. Goodwill The change in goodwill are as follows (in thousands): September 30, 2021 December 31, 2020 Balance at the beginning of the period $ 2,811 $ 1,379 Goodwill recorded on acquisition of LEEDS — 1,432 Measurement period adjustment 5 — Balance at the end of the period $ 2,816 $ 2,811

Intangible Assets, net

Intangible Assets, net	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	Note 7. Intangible Assets, net Intangible assets consist of the following (in thousands): September 30, 2021 Gross Accumulated Amortization Net Customer relationships $ 14,570 $ ( 885 ) $ 13,685 Patents 1,200 ( 1,078 ) 122 Total intangible assets, net $ 15,770 $ ( 1,963 ) $ 13,807 December 31, 2020 Gross Accumulated Amortization Net Customer relationships $ 14,570 $ ( 147 ) $ 14,423 Patents 1,158 ( 1,041 ) 117 Total intangible assets, net $ 15,728 $ ( 1,188 ) $ 14,540 Intangible amortization expense was approximately $ 257,000 and $ 774,000 for the three and nine months ended September 30, 2021, respectively. Intangible amortization expense was approximately $ 0 and $ 71,000 for the three and nine months ended September 30, 2020, respectively. The following table presents future intangible asset amortization as of September 30, 2021 (in thousands): Remainder of 2021 $ 270 2022 1,036 2023 1,014 2024 999 2025 978 Thereafter 9,510 Total $ 13,807

Details of Certain Condensed Co

Details of Certain Condensed Consolidated Balance Sheet Accounts	9 Months Ended
	Sep. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Details of Certain Condensed Consolidated Balance Sheet Accounts	Note 8. Details of Certain Condensed Consolidated Balance Sheet Accounts Accounts receivable and contract assets (in thousands): September 30, December 31, 2021 2020 Accounts receivable $ 13,078 $ 12,459 Contract asset 383 536 Allowance for potential credit losses ( 87 ) ( 74 ) $ 13,374 $ 12,921 Prepaid expenses and other current assets (in thousands): September 30, December 31, 2021 2020 Prepaid software and licenses $ 549 $ 653 Prepaid insurance 978 561 Other prepaid expenses 291 135 Deferred commissions 819 715 Other 243 108 $ 2,880 $ 2,172 Other assets (long-term) (in thousands): September 30, December 31, 2021 2020 Deferred commissions $ 1,726 $ 1,465 Other 198 140 $ 1,924 $ 1,605 Accrued expenses and other current liabilities (in thousands): September 30, December 31, 2021 2020 Personnel-related accruals $ 4,920 $ 4,217 Royalties payable 52 55 Professional fees 386 92 Sales/ use tax payable 46 46 Contingent consideration liability — 403 Operating lease liabilities 189 484 Other 276 316 $ 5,869 $ 5,613 Other liabilities (long-term) (in thousands): September 30, December 31, 2021 2020 Operating lease liabilities $ 311 $ 461 Contingent consideration liability 170 170 $ 481 $ 631

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Note 9. Related Party Transactions During the three and nine months ended September 30, 2021 , the Company recognized approximately $ 22,000 and $ 85,000 , respectively, in revenues from ShotSpotter Labs projects with charitable organizations that have received donations from one of the Company’s directors and from one of the Company’s significant stockholders. During the three and nine months ended September 30, 2020, the Company recognized approximately $ 60,000 and $ 0.2 million, respectively, in revenues from those ShotSpotter Labs projects.

Stock Repurchase Program

Stock Repurchase Program	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Stock Repurchase Program	Note 10. Stock Repurchase Program During the nine months ended September 30, 2021 , the Company repurchased 95,151 shares of its common stock at an average price of $ 37.82 per share for $ 3.6 million. The repurchases were made in open market transactions using cash on hand, and all of the shares repurchased were retired. At September 30, 2021 , $ 3.1 million remained available for repurchase under the Company's stock repurchase program.

Net Income per Share

Net Income per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Net Income per Share	Note 11. Net Income per Share The computation of basic net income per share is based on the weighted-average number of shares of common stock outstanding during each period. The computation of diluted net income per share is based on the weighted-average number of shares outstanding during the period plus, when their effect is dilutive, incremental shares consisting of shares subject to stock options, restricted stock units, employee stock purchase plan purchase rights and warrants. The following table summarizes the computation of basic and diluted net income per share (in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Numerator: Net (loss) income $ ( 949 ) $ 566 $ ( 1,120 ) $ 1,445 Denominator: Weighted-average shares outstanding, basic 11,680,413 11,423,079 11,634,422 11,383,860 Dilutive effect of common stock equivalents — 304,033 — 334,910 Weighted-average shares outstanding, diluted 11,680,413 11,727,112 11,634,422 11,718,770 Net (loss) income per share, basic $ ( 0.08 ) $ 0.05 $ ( 0.10 ) $ 0.13 Net (loss) income per share, diluted $ ( 0.08 ) $ 0.05 $ ( 0.10 ) $ 0.12 Anti-dilutive employee share-based awards, excluded 416,161 544,269 557,301 568,980

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans	Note 12. Equity Incentive Plans Stock options: A summary of option activities under the 2005 Plan and 2017 Plan during the nine months ended September 30 , 2021 is as follows: Number Weighted Outstanding as of December 31, 2020 813,242 $ 24.58 Granted 89,919 $ 39.15 Exercised ( 91,582 ) $ 9.61 Canceled ( 24,149 ) $ 32.49 Outstanding as of September 30, 2021 787,430 $ 27.77 Restricted stock units: A summary of restricted stock unit ("RSU") activities under the 2017 Plan during the nine months ended September 30 , 2021 is as follows: Number of Restricted Stock Units Weighted Nonvested at December 31, 2020 141,508 $ 29.67 Granted 82,502 $ 37.73 Vested ( 71,421 ) $ 28.08 Canceled ( 15,761 ) $ 31.38 Nonvested at September 30, 2021 136,828 $ 35.13 2017 Employee Stock Purchase Plan There were 18,294 shares issued under the 2017 Employee Stock Purchase Plan ("2017 ESPP") during the nine months ended September 30 , 2021. The number of shares available for grant under the 2017 ESPP was 261,277 as of September 30, 2021. Total stock-based compensation expense associated with the 2005 Plan, 2017 Plan and 2017 ESPP is recorded in the condensed consolidated statements of operations and was allocated as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 372 $ 292 $ 1,179 $ 788 Sales and marketing 399 344 1,182 925 Research and development 181 160 543 416 General and administrative 501 400 1,418 1,117 Total $ 1,453 $ 1,196 $ 4,322 $ 3,246

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13. Commitments and Contingencies Contingencies On August 28, 2018, Silvon S. Simmons (the “Plaintiff”) amended a complaint against the City of Rochester, New York and various city employees, filed in the United States District Court, Western District of New York, to add the Company and employees as a defendant. The amended complaint alleges conspiracy to violate plaintiff’s civil rights, denial of the right to a fair trial, and malicious prosecution. The Plaintiff claims that ShotSpotter colluded with the City of Rochester to fabricate and create gunshot alert evidence to secure Plaintiff’s conviction. On the basis of the allegations, the Plaintiff has petitioned for compensatory and punitive damages and other costs and expenses, including attorney’s fees. The Company believes that the Plaintiff’s claims are without merit and is disputing them vigorously. On October 12, 2021, the Company filed a defamation lawsuit against VICE Media, LLC ("VICE"), in Delaware Superior Court. The complaint alleges that VICE intentionally misrepresented court records and targeted ShotSpotter with false accusations in order to cultivate a subversive brand that enables VICE to sell sponsored content to corporate advertisers. ShotSpotter seeks more than $ 200 million in compensatory damages and $ 100 million in punitive damages. The Company may become subject to legal proceedings, as well as demands and claims that arise in the normal course of business. Such claims, even if not meritorious, could result in the expenditure of significant financial and management resources. The Company makes a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed and adjusted to include the impacts of negotiations, estimated settlements, legal rulings, advice of legal counsel, and other information and events pertaining to a particular matter. An unfavorable outcome on any litigation matters could require payment of substantial damages, or, in connection with any intellectual property infringement claims, could require the Company to pay ongoing royalty payments or could prevent the Company from selling certain of our products. As a result, a settlement of, or an unfavorable outcome on, any of the matters referenced above or other litigation matters could have a material adverse effect on the Company’s business, operating results, financial condition and cash flows. The COVID-19 pandemic has resulted in a substantial curtailment of business activities worldwide and is causing weakened economic conditions, both in the United States and many countries abroad. As part of intensifying efforts to contain the spread of COVID-19, many companies and state, local and foreign governments have imposed restrictions, including shelter-in-place orders and travel bans. While some of these companies and jurisdictions have started to relax such restrictions, in some cases, the restrictions were put back in place after having been lifted. The Company understands that the ongoing COVID-19 pandemic, associated travel restrictions and social distancing requirements may continue to have an adverse impact on its results of operations. While the ultimate economic impact of the COVID-19 pandemic is highly uncertain, the Company expects that its business and results of operations, including its revenues, earnings and cash flows from operations, may be adversely impacted for at least the balance of 2021. The Company may be adversely affected by increasing social unrest, protests against racial inequality, protests against police brutality and associated ongoing movements such as “Defund the Police”. These events may directly or indirectly affect police agency budgets and funding available to current and potential customers. Participants in these events may also attempt to create the perception that the Company’s solutions are contributing to the “problem”, which may adversely affect the Company, its business and results of operations, including its revenues, earnings and cash flows from operations.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Note 14. Subsequent Events In August, 2021, the Company entered into an agreement to lease approximately 11,625 square feet of office space in Fremont, California. The lease commenced on October 1, 2021 and expires on February 28, 2027 (the “Initial Term”). The Company will occupy the facility once all tenant improvements are completed, expected in January, 2022. The aggregate base rent due over the Initial Term under the terms of the lease agreement is approximately $ 2.2 million (without giving effect to certain rent abatement terms). The Company will also be responsible for the payment of additional rent to cover certain costs, taxes and insurance.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated financial statements include the results of the Company and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated upon consolidation. The accompanying condensed consolidated financial statements and related financial information should be read in conjunction with the consolidated financial statements filed with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (“Annual Report”) filed with the SEC on March 29, 2021. In the opinion of management, the accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive income (loss), stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations or cash flows to be anticipated for the full year 2021 or any future period. The Company has evaluated subsequent events occurring after the date of the condensed consolidated financial statements for events requiring recording or disclosure in the condensed consolidated financial statements.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates, including the valuation of accounts receivable, the lives and realization of tangible and intangible assets, contingent consideration liabilities, stock-based compensation expense, customer life, accounting for revenue recognition, contingent liabilities related to legal matters, and income taxes including deferred taxes and any related valuation allowance. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the Company’s financial position and results of operations. The Company records net deferred tax assets to the extent the Company believes these assets will more likely than not be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. In the event the Company determines that it would be able to realize its deferred assets in the future in excess of their net recorded amount, the Company makes an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.
Concentrations of Risk	Concentrations of Risk Credit Risk – Financial instruments that potentially subject the Company to concentration of credit risk consisted primarily of cash and cash equivalents and accounts receivable from trade customers. The Company maintains its cash deposits at one domestic and four international financial institutions. The Company is exposed to credit risk in the event of default by a financial institution to the extent that cash and cash equivalents are in excess of the amount insured by the Federal Deposit Insurance Corporation and other local country government agencies. The Company generally places its cash and cash equivalents with high-credit quality financial institutions. To date, the Company has not experienced any losses on its cash and cash equivalents. Concentration of Accounts Receivable and Contract Asset – At September 30, 2021, two customers accounted for 22 % and 19 % of the Company’s total accounts receivable, respectively. At December 31, 2020, three customers accounted for 37 %, 27 % and 11 %, respectively, of the Company’s total accounts receivable. Concentration of Revenues – For the three months ended September 30, 2021, two customers accounted for 26 % and 14 % of the Company’s total revenues, respectively. For the three months ended September 30, 2020, two customers accounted for 18 % and 13 % of the Company’s total revenues, respectively. For the nine months ended September 30, 2021, two customers accounted for 30 % and 14 % of the Company’s total revenues, respectively. For the nine months ended September 30, 2020, two customers accounted for 18 % and 13 % of the Company’s total revenues, respectively. Concentration of Suppliers – The Company relies on a limited number of suppliers and contract manufacturers. In particular, a single supplier is currently the sole manufacturer of the Company’s proprietary sensors.
Accounting Pronouncements Recently Adopted	Accounting Pronouncements Recently Adopted In December 2019, the FASB issued ASU 2019-12 , Income Taxes (Topic 740), simplifying the accounting for income taxes by removing certain exceptions to the general principles. The Company adopted this ASU as of January 1, 2021 . The adoption of this ASU did not have any impact on the Company’s condensed consolidated financial statements In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses (Topic 326) : Measurement of Credit Losses on Financial Instruments. The amendments in this ASU replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects current expected credit loss and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company adopted this ASU as of January 1, 2021 . The adoption of this ASU did not have a material impact on the Company’s condensed consolidated financial statements. Accounting Pronouncements Not Yet Adopted In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts from Customers . ASU 2021-08 aims to improve the accounting for acquired revenue contracts with customers in a business combination by addressing diversity in practice and inconsistency related to recognition of an acquired contract liability and the effect of payment terms on subsequent revenue recognized by the acquirer. These amendments are effective prospectively for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is allowed. The Company is currently assessing the impact the adoption of this ASU will have on its consolidated financial statements and related disclosures.

Revenue Related Disclosures (Ta

Revenue Related Disclosures (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Changes in Deferred Revenue	The changes in deferred revenue were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Balance at the beginning of period $ 19,791 $ 22,308 $ 24,579 $ 26,958 New billings 16,512 9,650 41,336 26,653 Revenue recognized during the period from balance at the beginning of the period ( 8,999 ) ( 9,519 ) ( 22,659 ) ( 22,790 ) Revenue recognized during the period from new billings ( 5,467 ) ( 1,796 ) ( 21,419 ) ( 10,178 ) Foreign currency impact ( 7 ) — ( 7 ) — Balance at end of period $ 21,830 $ 20,643 $ 21,830 $ 20,643 ​ ​ ​ ​ ​ ​ ​
Schedule of Remaining Performance Obligations for Contractually Committed Revenues	The following table presents remaining performance obligations for contractually committed revenues as of September 30, 2021 (in thousands): Remainder of 2021 $ 24,318 2022 13,932 2023 10,683 Thereafter 10,269 Total $ 59,202

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Summary of Changes in Fair Value of Contingent Consideration Liability	The changes in the fair value of contingent consideration liability for the nine months ended September 30, 2021 and 2020 are as follows (in thousands): Nine Months Ended September 30, 2021 2020 Balance, beginning of period $ 573 $ 750 Payment of contingent consideration liability ( 403 ) ( 347 ) Balance, end of period $ 170 $ 403

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	The change in goodwill are as follows (in thousands): September 30, 2021 December 31, 2020 Balance at the beginning of the period $ 2,811 $ 1,379 Goodwill recorded on acquisition of LEEDS — 1,432 Measurement period adjustment 5 — Balance at the end of the period $ 2,816 $ 2,811

Intangible Assets Net (Tables)

Intangible Assets Net (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets Net	Intangible assets consist of the following (in thousands): September 30, 2021 Gross Accumulated Amortization Net Customer relationships $ 14,570 $ ( 885 ) $ 13,685 Patents 1,200 ( 1,078 ) 122 Total intangible assets, net $ 15,770 $ ( 1,963 ) $ 13,807 December 31, 2020 Gross Accumulated Amortization Net Customer relationships $ 14,570 $ ( 147 ) $ 14,423 Patents 1,158 ( 1,041 ) 117 Total intangible assets, net $ 15,728 $ ( 1,188 ) $ 14,540
Schedule of Future Intangible Asset Amortization	The following table presents future intangible asset amortization as of September 30, 2021 (in thousands): Remainder of 2021 $ 270 2022 1,036 2023 1,014 2024 999 2025 978 Thereafter 9,510 Total $ 13,807

Details of Certain Condensed _2

Details of Certain Condensed Consolidated Balance Sheet Accounts (Tables)	9 Months Ended
	Sep. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Schedule of Accounts Receivable and Contract Asset	Accounts receivable and contract assets (in thousands): September 30, December 31, 2021 2020 Accounts receivable $ 13,078 $ 12,459 Contract asset 383 536 Allowance for potential credit losses ( 87 ) ( 74 ) $ 13,374 $ 12,921
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets (in thousands): September 30, December 31, 2021 2020 Prepaid software and licenses $ 549 $ 653 Prepaid insurance 978 561 Other prepaid expenses 291 135 Deferred commissions 819 715 Other 243 108 $ 2,880 $ 2,172
Schedule of Other Assets Long-term	Other assets (long-term) (in thousands): September 30, December 31, 2021 2020 Deferred commissions $ 1,726 $ 1,465 Other 198 140 $ 1,924 $ 1,605
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities (in thousands): September 30, December 31, 2021 2020 Personnel-related accruals $ 4,920 $ 4,217 Royalties payable 52 55 Professional fees 386 92 Sales/ use tax payable 46 46 Contingent consideration liability — 403 Operating lease liabilities 189 484 Other 276 316 $ 5,869 $ 5,613
Schedule of Other Long-term Liabilities	Other liabilities (long-term) (in thousands): September 30, December 31, 2021 2020 Operating lease liabilities $ 311 $ 461 Contingent consideration liability 170 170 $ 481 $ 631

Net Income per Share (Tables)

Net Income per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Net Income per Share	The following table summarizes the computation of basic and diluted net income per share (in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Numerator: Net (loss) income $ ( 949 ) $ 566 $ ( 1,120 ) $ 1,445 Denominator: Weighted-average shares outstanding, basic 11,680,413 11,423,079 11,634,422 11,383,860 Dilutive effect of common stock equivalents — 304,033 — 334,910 Weighted-average shares outstanding, diluted 11,680,413 11,727,112 11,634,422 11,718,770 Net (loss) income per share, basic $ ( 0.08 ) $ 0.05 $ ( 0.10 ) $ 0.13 Net (loss) income per share, diluted $ ( 0.08 ) $ 0.05 $ ( 0.10 ) $ 0.12 Anti-dilutive employee share-based awards, excluded 416,161 544,269 557,301 568,980

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Stock Option Activity	A summary of option activities under the 2005 Plan and 2017 Plan during the nine months ended September 30 , 2021 is as follows: Number Weighted Outstanding as of December 31, 2020 813,242 $ 24.58 Granted 89,919 $ 39.15 Exercised ( 91,582 ) $ 9.61 Canceled ( 24,149 ) $ 32.49 Outstanding as of September 30, 2021 787,430 $ 27.77
Schedule of Unvested Restricted Stock Units Awards Activity	A summary of restricted stock unit ("RSU") activities under the 2017 Plan during the nine months ended September 30 , 2021 is as follows: Number of Restricted Stock Units Weighted Nonvested at December 31, 2020 141,508 $ 29.67 Granted 82,502 $ 37.73 Vested ( 71,421 ) $ 28.08 Canceled ( 15,761 ) $ 31.38 Nonvested at September 30, 2021 136,828 $ 35.13
Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations	Total stock-based compensation expense associated with the 2005 Plan, 2017 Plan and 2017 ESPP is recorded in the condensed consolidated statements of operations and was allocated as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 372 $ 292 $ 1,179 $ 788 Sales and marketing 399 344 1,182 925 Research and development 181 160 543 416 General and administrative 501 400 1,418 1,117 Total $ 1,453 $ 1,196 $ 4,322 $ 3,246

Organization and Description _2

Organization and Description of Business - Additional Information (Details)	9 Months Ended
	Sep. 30, 2021City
Minimum
Business And Nature Of Operations [Line Items]
Number of cities in which entity operates	125

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) - Customer	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
ASU 2019-12
Accounting Policies [Line Items]
Change in accounting principle, ASU, adopted	true		true
Change in accounting principle, ASU, adoption date	Jan. 1, 2021		Jan. 1, 2021
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true		true
ASU 2016-13
Accounting Policies [Line Items]
Change in accounting principle, ASU, adopted	true		true
Change in accounting principle, ASU, adoption date	Jan. 1, 2021		Jan. 1, 2021
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true		true
Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Number of customers			2		3
Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Number of customers	2	2	2	2
Customer One | Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Concentration risk percentage			22.00%		37.00%
Customer One | Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Concentration risk percentage	26.00%	18.00%	30.00%	18.00%
Customer Two | Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Concentration risk percentage			19.00%		27.00%
Customer Two | Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Concentration risk percentage	14.00%	13.00%	14.00%	13.00%
Customer Three | Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Concentration risk percentage					11.00%

Revenue Related Disclosures - S

Revenue Related Disclosures - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Balance at the beginning of the year	$ 19,791	$ 22,308	$ 24,579	$ 26,958
New billings	16,512	9,650	41,336	26,653
Foreign currency impact	(7)		(7)
Balance at the end of the year	21,830	20,643	21,830	20,643
Recognition From Balance at the Beginning of the Year
Disaggregation of Revenue [Line Items]
Revenue recognized during the period	(8,999)	(9,519)	(22,659)	(22,790)
Revenue Recognized During the Year from New Billings
Disaggregation of Revenue [Line Items]
Revenue recognized during the period	$ (5,467)	$ (1,796)	$ (21,419)	$ (10,178)

Revenue Related Disclosures -_2

Revenue Related Disclosures - Schedule of Remaining Performance Obligations for Contractual Committed (Details) $ in Thousands	Sep. 30, 2021USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 59,202
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Estimated remaining performance obligations for contractually committed revenues	$ 24,318
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Estimated remaining performance obligations for contractually committed revenues	$ 13,932
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Estimated remaining performance obligations for contractually committed revenues	$ 10,683
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Estimated remaining performance obligations for contractually committed revenues	$ 10,269

Revenue Related Disclosures -_3

Revenue Related Disclosures - Schedule of Estimated Remaining Performance Obligations for Contractual Committed 1 (Details) $ in Thousands	Sep. 30, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 59,202

Revenue Related Disclosures - A

Revenue Related Disclosures - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Subscription, maintenance and support services Member
Disaggregation Of Revenue [Line Items]
Revenues	$ 14.2		$ 41.1
Professional software development services member
Disaggregation Of Revenue [Line Items]
Revenues	0.3		3
United States
Disaggregation Of Revenue [Line Items]
Revenues	14.3	$ 11.2	43.6	$ 32.6
Bahamas
Disaggregation Of Revenue [Line Items]
Revenues	0.2	$ 0.2	0.5	$ 0.5
South Africa
Disaggregation Of Revenue [Line Items]
Revenues	$ 0.2		$ 0.5

Business Acquisition - Addition

Business Acquisition - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2021	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 2,811	$ 2,816	$ 1,379
LEEDS
Business Acquisition [Line Items]
Business acquisition purchase consideration in cash	21,600
Net tangible assets	8,000
Identifiable intangible assets	14,400
Goodwill	1,400
Preliminary fair value of the contingent earnout	200
Business acquisition estimated purchase consideration/purchase consideration	23,800
LEEDS | Common Stock
Business Acquisition [Line Items]
Business acquisition purchase consideration, stock issued	$ 2,000

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	Feb. 28, 2021	Jan. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Payment of contingent consideration liability			$ 403	$ 347
Estimated fair value of contingent consideration			$ 200
Azavea, Inc
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Payment of contingent consideration liability	$ 400	$ 300

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Changes in Fair Value of Contingent Consideration Liability (Details) - Fair Value Measurements Recurring - Level 3 - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	$ 573	$ 750
Payment of contingent consideration liability	(403)	(347)
Balance, end of period	$ 170	$ 403

Goodwill - Schedule of Changes

Goodwill - Schedule of Changes in Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Balance at the beginning of the period	$ 2,811	$ 1,379
Goodwill recorded on acquisition of LEEDS		1,432
Measurement period adjustment	5
Balance at the end of the period	$ 2,816	$ 2,811

Intangible Assets, Net - Schedu

Intangible Assets, Net - Schedule of Intangible Assets Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross	$ 15,770	$ 15,728
Accumulated Amortization	(1,963)	(1,188)
Net	13,807	14,540
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross	14,570	14,570
Accumulated Amortization	(885)	(147)
Net	13,685	14,423
Patents
Finite-Lived Intangible Assets [Line Items]
Gross	1,200	1,158
Accumulated Amortization	(1,078)	(1,041)
Net	$ 122	$ 117

Intangible Assets, net (Additio

Intangible Assets, net (Additional Information) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible amortization expense	$ 257,000	$ 0	$ 774,000	$ 71,000

Intangible Assets, net - Net -

Intangible Assets, net - Net - Schedule of Future Intangible Asset Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Remainder of 2021	$ 270
2022	1,036
2023	1,014
2024	999
2025	978
Thereafter	9,510
Net	$ 13,807	$ 14,540

Details of Certain Consolidated

Details of Certain Consolidated Balance Sheet Accounts - Schedule of Accounts Receivable and Contract Asset (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Accounts receivable	$ 13,078	$ 12,459
Contract asset	383	536
Allowance for potential credit losses	(87)	(74)
Accounts receivable and contract asset	$ 13,374	$ 12,921

Details of Certain Condensed _3

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid software and licenses	$ 549	$ 653
Prepaid insurance	978	561
Other prepaid expenses	291	135
Deferred commissions	819	715
Other	243	108
Total	$ 2,880	$ 2,172

Details of Certain Condensed _4

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Other Assets Long-term (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets Noncurrent Disclosure [Abstract]
Deferred commissions	$ 1,726	$ 1,465
Other	198	140
Total other assets	$ 1,924	$ 1,605

Details of Certain Condensed _5

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accrued Expenses And Other Current Liabilities [Abstract]
Personnel-related accruals	$ 4,920	$ 4,217
Royalties payable	52	55
Professional fees	386	92
Sales/ use tax payable	46	46
Contingent consideration liability		403
Operating lease liabilities	189	484
Other	276	316
Accrued expenses and other current liabilities	$ 5,869	$ 5,613

Details of Certain Condensed _6

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities, Noncurrent [Abstract]
Operating lease liabilities	$ 311	$ 461
Contingent consideration liability	170	170
Other liabilities, noncurrent	$ 481	$ 631

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
ShotSpotter Labs
Related Party Transaction [Line Items]
Revenue from related parties	$ 22,000	$ 60,000	$ 85,000	$ 200,000

Stock Repurchase Program - Addi

Stock Repurchase Program - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Sep. 30, 2021
Class Of Stock [Line Items]
Repurchase of common stock					95,151
Amount authorized to repurchase remaining available common stock	$ 3,100				$ 3,100
Average price per share					$ 37.82
Repurchase of common stock amount	$ 918	$ 491	$ 2,192	$ 1,615	$ 3,600

Net Income per Share - Summary

Net Income per Share - Summary of Computation of Basic and Diluted Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net (loss) income	$ (949)	$ (250)	$ 79	$ 566	$ 866	$ 13	$ (1,120)	$ 1,445
Denominator:
Weighted-average shares outstanding, basic	11,680,413			11,423,079			11,634,422	11,383,860
Dilutive effect of common stock equivalents				304,033				334,910
Weighted-average shares outstanding, diluted	11,680,413			11,727,112			11,634,422	11,718,770
Net (loss) income per share, basic	$ (0.08)			$ 0.05			$ (0.10)	$ 0.13
Net (loss) income per share, diluted	$ (0.08)			$ 0.05			$ (0.10)	$ 0.12
Anti-dilutive employee share-based awards, excluded	416,161			544,269			557,301	568,980

Equity Incentive Plans - Schedu

Equity Incentive Plans - Schedule of Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding, Beginning Balance | shares	813,242
Number of Options Outstanding, Granted | shares	89,919
Number of Options Outstanding, Exercised | shares	(91,582)
Number of Options Outstanding, Canceled | shares	(24,149)
Number of Options Outstanding, Ending Balance | shares	787,430
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 24.58
Weighted Average Exercise Price, Granted | $ / shares	39.15
Weighted Average Exercise Price, Exercised | $ / shares	9.61
Weighted Average Exercise Price, Canceled | $ / shares	32.49
Weighted Average Exercise Price, Ending Balance | $ / shares	$ 27.77

Equity Incentive Plans - Sche_2

Equity Incentive Plans - Schedule of Unvested Restricted Stock Units Awards Activity - (Details) - Restricted Stock Unit	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock Units, Beginning Balance | shares	141,508
Number of Units, Granted | shares	82,502
Number of Restricted Stock Units, Vested | shares	(71,421)
Number of Restricted Stock Units, Canceled | shares	(15,761)
Number of Restricted Stock Units, Ending Balance | shares	136,828
Weighted Average Grant Date Fair Value per RSU, Beginning BalanceDate Fair Value, Beginning Balance | $ / shares	$ 29.67
Weighted Average Grant Date Fair Value per RSU, Granted | $ / shares	37.73
Weighted Average Grant Date Fair Value per RSU, Vested | $ / shares	28.08
Weighted Average Grant Date Fair Value per RSU, Canceled | $ / shares	31.38
Weighted Average Grant Date Fair Value per RSU, Ending Balance | $ / shares	$ 35.13

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) - 2017 Employee Stock Purchase Plan	9 Months Ended
	Sep. 30, 2021shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for future grant	261,277
Shares issued under ESPP	18,294

Equity Incentive Plans - Sche_3

Equity Incentive Plans - Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,453	$ 1,196	$ 4,322	$ 3,246
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	372	292	1,179	788
Sale and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	399	344	1,182	925
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	181	160	543	416
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 501	$ 400	$ 1,418	$ 1,117

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Millions	Oct. 12, 2021USD ($)
Compensatory Damages | Minimum
Loss Contingencies [Line Items]
Loss contingency damages sought value	$ 200
Punitive Damages
Loss Contingencies [Line Items]
Loss contingency damages sought value	$ 100

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Lease Agreement $ in Millions	1 Months Ended
	Aug. 31, 2021USD ($)ft²
Subsequent Event [Line Items]
Leased office space area | ft²	11,625
Lease commencement date	Oct. 1, 2021
Lease expiration date	Feb. 28, 2027
Lease expense | $	$ 2.2