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Balance Sheet Components | 3 Months Ended
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Apr. 30, 2019
Balance Sheet Components [Abstract] |
Balance Sheet Components | Note 4: Balance Sheet Components The following sections and tables provide details of selected balance sheet items (in thousands): Inventories
|  | As of |
|  | April 30, 2019 |  |  | January 31, 2019 |
Finished goods |  | $ | 8,190 |  |  | $ | 7,567 |
Raw materials |  |  | 2,509 |  |  |  | 2,550 |
Total inventory |  | $ | 10,699 |  |  | $ | 10,117 |
Other current assets
|  | As of |
|  | April 30, 2019 |  |  | January 31, 2019 |
Prepaid expenses |  | $ | 2,342 |  |  | $ | 2,681 |
Deferred sales commissions, current |  |  | 1,395 |  |  |  | 1,081 |
Deferred inventory costs |  |  | 403 |  |  |  | 334 |
Other current assets |  |  | 1,244 |  |  |  | 1,354 |
Total other current assets |  | $ | 5,384 |  |  | $ | 5,450 |
Under Topic 606, the Company capitalizes a significant portion of its sales commission costs as an incremental cost of obtaining customer contracts and amortizes to sales and marketing expense over an expected benefit period of five years. During the three months ended April 30, 2019 and 2018, amortization expense for deferred sales commissions was $0.4 million and less than $0.1 million, respectively. To date, there have been no impairment losses related to the costs capitalized. Other long-term assets
|  | As of |
|  | April 30, 2019 |  |  | January 31, 2019 |
Deferred sales commissions, non-current |  | $ | 4,292 |  |  | $ | 3,387 |
Convertible note receivable, including interest income |  |  | 1,348 |  |  |  | 1,300 |
Other non-current assets |  |  | 841 |  |  |  | 692 |
Total other assets |  | $ | 6,481 |  |  | $ | 5,379 |
In December 2018, the Company invested $1.3 million in cash to Global Telecomm Corporation (“GTC”), a small privately-held technology company, in exchange for an 18-month convertible promissory note, bearing interest at 10% annually. The principal and unpaid accrued interest on the promissory note will convert to shares of GTC common or preferred stock upon the occurrence of certain future events. As of April 30, 2019 and January 31, 2019, the Company did not hold any shares of GTC common or preferred stock. The Company has partnered with GTC on certain research and development efforts. The Company is required to consolidate the assets and liabilities of variable interest entities (“VIEs”) in which it is deemed to be the primary beneficiary. GTC is considered a VIE because, among other factors, it lacks sufficient equity to permit the entity to finance its activities without additional subordinated financial support from other parties. The Company’s convertible promissory note issued by GTC represents a variable interest. However, the Company does not participate in the day-to-day operating decisions or other decisions that would allow it to control GTC, and therefore, the Company is not considered the primary beneficiary and does not need to consolidate GTC’s financial statements in the Company’s financial statements. As of April 30, 2019 and January 31, 2019, the Company’s maximum exposure to loss was equal to the carrying value of its convertible note receivable and associated interest receivable. For all periods presented, the Company had no other variable interests in VIEs. As a result of the Company’s investment, GTC is a related party of the Company. During the three months ended April 30, 2019, the Company procured certain raw material inventories from GTC that amounted to approximately $0.2 million. As of April 30, 2019 and January 31, 2019, the Company recorded prepaid inventory deposits to GTC of $0.3 million and zero, respectively, included in other current assets on the condensed consolidated balance sheet. Accrued expenses
|  | As of |
|  | April 30, 2019 |  |  | January 31, 2019 |
Payroll and related expenses |  | $ | 4,467 |  |  | $ | 7,926 |
Regulatory fees and taxes |  |  | 5,225 |  |  |  | 5,645 |
Short-term operating lease liabilities (1) |  |  | 1,836 |  |  |  | — |
Acquisition-related consideration |  |  | 906 |  |  |  | 925 |
Other |  |  | 4,645 |  |  |  | 4,552 |
Total accrued expenses |  | $ | 17,079 |  |  | $ | 19,048 |
(1) The Company adopted Topic 842, the new accounting standard for leasing arrangements on February 1, 2019. See Note 6: Operating Leases below.

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- Definition Balance sheet components. + References No definition available. + Details
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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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